Feb 012011

Here is my ASCII Code generator that I created: ASCII CODE GENERATOR.



Some Mathematics characters are part of the Unicode character set, so you need to declare that in the head of your documents:

<meta http-equiv=”content-type” content=”text/html;charset=utf-8″ />

Display Friendly Code Numerical Code Hex Code Description
  &#8722; &#x2212; Minus Sign
+ + &#43; &#x2B; Plus Sign
± &plusmn; &#177; &#xB1; Plus or Minus Sign
× &times; &#215; &#xD7; Multiplication Sign
÷ &divide; &#247; &#xF7; Division Sign
% % &#37; &#x25; Percent Sign
  &#137; &#x2030; Per Million Sign
= = &#61; &#x3D; Equal Sign
  &#8800; &#x2260; Not Equal To Sign
  &#8776; &#x2248; Approximately Equal Sign
  &#8801; &#x2261; Identical To Sign
< &lt; &#60; &#x3C; Less Than Sign
> &gt; &#62; &#x3E; Greater Than Sign
  &#8804; &#x2264; Less Than or Equal To Sign
  &#8805; &#x2265; Greater Than or Equal To Sign
  &#8734; &#x221E; Infinity Sign
  &#8539; &#x215B; One Eighth Fraction
¼ &frac14; &#188; &#xBC; One Quarter Fraction
  &#8540; &#x215C; Three Eighths Fraction
½ &frac12; &#189; &#xBD; One Half Fraction
  &#8541; &#x215D; Five Eighths Fraction
¾ &frac34; &#190; &#xBE; Three Quarters Fraction
  &#8542; &#x215E; Seven Eighths Fraction
  &#8747; &#x222B; Integral Sign
  &#8706; &#x2202; Partial Differential Sign
  &#8710; &#x2206; Increment Sign
  &#8719; &#x220F; N-ary Product Sign
  &#8721; &#x2211; N-ary Sum Sign
  &#8730; &#x221A; Square Root Sign
  &#8735; &#x221F; Right Angle Sign
  &#8745; &#x2229; Intersection Sign
  &#8729; &#x2219; Bullet Operator
ƒ   &#131; &#x83; Function Sign
  &#8260; &#x2044; Fraction Slash
Jan 282011

  You always find news about what's going on as well as the latest versions
  from the curl web pages, located at:



  Get the main page from Netscape's web-server:

        curl http://www.netscape.com/

  Get the README file the user's home directory at funet's ftp-server:

        curl ftp://ftp.funet.fi/README

  Get a web page from a server using port 8000:

        curl http://www.weirdserver.com:8000/

  Get a list of a directory of an FTP site:

        curl ftp://cool.haxx.se/

  Get the definition of curl from a dictionary:

        curl dict://dict.org/m:curl

  Fetch two documents at once:

        curl ftp://cool.haxx.se/ http://www.weirdserver.com:8000/

  Get a file off an FTPS server:

        curl ftps://files.are.secure.com/secrets.txt

  or use the more appropriate FTPS way to get the same file:

        curl --ftp-ssl ftp://files.are.secure.com/secrets.txt

  Get a file from an SSH server using SFTP:

        curl -u username sftp://shell.example.com/etc/issue

  Get a file from an SSH server using SCP using a private key to authenticate:

        curl -u username: --key ~/.ssh/id_dsa --pubkey ~/.ssh/id_dsa.pub             scp://shell.example.com/~/personal.txt

  Get the main page from an IPv6 web server:

        curl -g "http://[2001:1890:1112:1::20]/"


  Get a web page and store in a local file:

        curl -o thatpage.html http://www.netscape.com/

  Get a web page and store in a local file, make the local file get the name
  of the remote document (if no file name part is specified in the URL, this
  will fail):

        curl -O http://www.netscape.com/index.html

  Fetch two files and store them with their remote names:

        curl -O www.haxx.se/index.html -O curl.haxx.se/download.html



   To ftp files using name+passwd, include them in the URL like:

        curl ftp://name:passwd@machine.domain:port/full/path/to/file

   or specify them with the -u flag like

        curl -u name:passwd ftp://machine.domain:port/full/path/to/file


   It is just like for FTP, but you may also want to specify and use
   SSL-specific options for certificates etc.

   Note that using FTPS:// as prefix is the "implicit" way as described in the
   standards while the recommended "explicit" way is done by using FTP:// and
   the --ftp-ssl option.


   This is similar to FTP, but you can specify a private key to use instead of
   a password. Note that the private key may itself be protected by a password
   that is unrelated to the login password of the remote system.  If you
   provide a private key file you must also provide a public key file.


   Curl also supports user and password in HTTP URLs, thus you can pick a file

        curl http://name:passwd@machine.domain/full/path/to/file

   or specify user and password separately like in

        curl -u name:passwd http://machine.domain/full/path/to/file

   HTTP offers many different methods of authentication and curl supports
   several: Basic, Digest, NTLM and Negotiate. Without telling which method to
   use, curl defaults to Basic. You can also ask curl to pick the most secure
   ones out of the ones that the server accepts for the given URL, by using

   NOTE! Since HTTP URLs don't support user and password, you can't use that
   style when using Curl via a proxy. You _must_ use the -u style fetch
   during such circumstances.


   Probably most commonly used with private certificates, as explained below.


 Get an ftp file using a proxy named my-proxy that uses port 888:

        curl -x my-proxy:888 ftp://ftp.leachsite.com/README

 Get a file from a HTTP server that requires user and password, using the
 same proxy as above:

        curl -u user:passwd -x my-proxy:888 http://www.get.this/

 Some proxies require special authentication. Specify by using -U as above:

        curl -U user:passwd -x my-proxy:888 http://www.get.this/

 A comma-separated list of hosts and domains which do not use the proxy can
 be specified as:

        curl --noproxy localhost,get.this -x my-proxy:888 http://www.get.this/

 If the proxy is specified with --proxy1.0 instead of --proxy or -x, then
 curl will use HTTP/1.0 instead of HTTP/1.1 for any CONNECT attempts.

 curl also supports SOCKS4 and SOCKS5 proxies with --socks4 and --socks5.

 See also the environment variables Curl support that offer further proxy


  With HTTP 1.1 byte-ranges were introduced. Using this, a client can request
  to get only one or more subparts of a specified document. Curl supports
  this with the -r flag.

  Get the first 100 bytes of a document:

        curl -r 0-99 http://www.get.this/

  Get the last 500 bytes of a document:

        curl -r -500 http://www.get.this/

  Curl also supports simple ranges for FTP files as well. Then you can only
  specify start and stop position.

  Get the first 100 bytes of a document using FTP:

        curl -r 0-99 ftp://www.get.this/README



  Upload all data on stdin to a specified server:

        curl -T - ftp://ftp.upload.com/myfile

  Upload data from a specified file, login with user and password:

        curl -T uploadfile -u user:passwd ftp://ftp.upload.com/myfile

  Upload a local file to the remote site, and use the local file name remote

        curl -T uploadfile -u user:passwd ftp://ftp.upload.com/

  Upload a local file to get appended to the remote file:

        curl -T localfile -a ftp://ftp.upload.com/remotefile

  Curl also supports ftp upload through a proxy, but only if the proxy is
  configured to allow that kind of tunneling. If it does, you can run curl in
  a fashion similar to:

        curl --proxytunnel -x proxy:port -T localfile ftp.upload.com


  Upload all data on stdin to a specified http site:

        curl -T - http://www.upload.com/myfile

  Note that the http server must have been configured to accept PUT before
  this can be done successfully.

  For other ways to do http data upload, see the POST section below.


  If curl fails where it isn't supposed to, if the servers don't let you in,
  if you can't understand the responses: use the -v flag to get verbose
  fetching. Curl will output lots of info and what it sends and receives in
  order to let the user see all client-server interaction (but it won't show
  you the actual data).

        curl -v ftp://ftp.upload.com/

  To get even more details and information on what curl does, try using the
  --trace or --trace-ascii options with a given file name to log to, like

        curl --trace trace.txt www.haxx.se


  Different protocols provide different ways of getting detailed information
  about specific files/documents. To get curl to show detailed information
  about a single file, you should use -I/--head option. It displays all
  available info on a single file for HTTP and FTP. The HTTP information is a
  lot more extensive.

  For HTTP, you can get the header information (the same as -I would show)
  shown before the data by using -i/--include. Curl understands the
  -D/--dump-header option when getting files from both FTP and HTTP, and it
  will then store the headers in the specified file.

  Store the HTTP headers in a separate file (headers.txt in the example):

        curl --dump-header headers.txt curl.haxx.se

  Note that headers stored in a separate file can be very useful at a later
  time if you want curl to use cookies sent by the server. More about that in
  the cookies section.


  It's easy to post data using curl. This is done using the -d <data>
  option.  The post data must be urlencoded.

  Post a simple "name" and "phone" guestbook.

        curl -d "name=Rafael%20Sagula&phone=3320780"                 http://www.where.com/guest.cgi

  How to post a form with curl, lesson #1:

  Dig out all the <input> tags in the form that you want to fill in. (There's
  a perl program called formfind.pl on the curl site that helps with this).

  If there's a "normal" post, you use -d to post. -d takes a full "post
  string", which is in the format


  The 'variable' names are the names set with "name=" in the <input> tags, and
  the data is the contents you want to fill in for the inputs. The data *must*
  be properly URL encoded. That means you replace space with + and that you
  write weird letters with %XX where XX is the hexadecimal representation of
  the letter's ASCII code.


  (page located at http://www.formpost.com/getthis/

        <form action="post.cgi" method="post">
        <input name=user size=10>
        <input name=pass type=password size=10>
        <input name=id type=hidden value="blablabla">
        <input name=ding value="submit">

  We want to enter user 'foobar' with password '12345'.

  To post to this, you enter a curl command line like:

        curl -d "user=foobar&pass=12345&id=blablabla&ding=submit"  (continues)


  While -d uses the application/x-www-form-urlencoded mime-type, generally
  understood by CGI's and similar, curl also supports the more capable
  multipart/form-data type. This latter type supports things like file upload.

  -F accepts parameters like -F "name=contents". If you want the contents to
  be read from a file, use <@filename> as contents. When specifying a file,
  you can also specify the file content type by appending ';type=<mime type>'
  to the file name. You can also post the contents of several files in one
  field.  For example, the field name 'coolfiles' is used to send three files,
  with different content types using the following syntax:

        curl -F "coolfiles=@fil1.gif;type=image/gif,fil2.txt,fil3.html"         http://www.post.com/postit.cgi

  If the content-type is not specified, curl will try to guess from the file
  extension (it only knows a few), or use the previously specified type (from
  an earlier file if several files are specified in a list) or else it will
  using the default type 'text/plain'.

  Emulate a fill-in form with -F. Let's say you fill in three fields in a
  form. One field is a file name which to post, one field is your name and one
  field is a file description. We want to post the file we have written named
  "cooltext.txt". To let curl do the posting of this data instead of your
  favourite browser, you have to read the HTML source of the form page and
  find the names of the input fields. In our example, the input field names
  are 'file', 'yourname' and 'filedescription'.

        curl -F "file=@cooltext.txt" -F "yourname=Daniel"              -F "filedescription=Cool text file with cool text inside"              http://www.post.com/postit.cgi

  To send two files in one post you can do it in two ways:

  1. Send multiple files in a single "field" with a single field name:

        curl -F "pictures=@dog.gif,cat.gif"

  2. Send two fields with two field names:

        curl -F "docpicture=@dog.gif" -F "catpicture=@cat.gif"

  To send a field value literally without interpreting a leading '@'
  or '<', or an embedded ';type=', use --form-string instead of
  -F. This is recommended when the value is obtained from a user or
  some other unpredictable source. Under these circumstances, using
  -F instead of --form-string would allow a user to trick curl into
  uploading a file.


  A HTTP request has the option to include information about which address
  that referred to actual page.  Curl allows you to specify the
  referrer to be used on the command line. It is especially useful to
  fool or trick stupid servers or CGI scripts that rely on that information
  being available or contain certain data.

        curl -e www.coolsite.com http://www.showme.com/

  NOTE: The Referer: [sic] field is defined in the HTTP spec to be a full URL.


  A HTTP request has the option to include information about the browser
  that generated the request. Curl allows it to be specified on the command
  line. It is especially useful to fool or trick stupid servers or CGI
  scripts that only accept certain browsers.


  curl -A 'Mozilla/3.0 (Win95; I)' http://www.nationsbank.com/

  Other common strings:
    'Mozilla/3.0 (Win95; I)'     Netscape Version 3 for Windows 95
    'Mozilla/3.04 (Win95; U)'    Netscape Version 3 for Windows 95
    'Mozilla/2.02 (OS/2; U)'     Netscape Version 2 for OS/2
    'Mozilla/4.04 [en] (X11; U; AIX 4.2; Nav)'           NS for AIX
    'Mozilla/4.05 [en] (X11; U; Linux 2.0.32 i586)'      NS for Linux

  Note that Internet Explorer tries hard to be compatible in every way:
    'Mozilla/4.0 (compatible; MSIE 4.01; Windows 95)'    MSIE for W95

  Mozilla is not the only possible User-Agent name:
    'Konqueror/1.0'             KDE File Manager desktop client
    'Lynx/2.7.1 libwww-FM/2.14' Lynx command line browser


  Cookies are generally used by web servers to keep state information at the
  client's side. The server sets cookies by sending a response line in the
  headers that looks like 'Set-Cookie: <data>' where the data part then
  typically contains a set of NAME=VALUE pairs (separated by semicolons ';'
  like "NAME1=VALUE1; NAME2=VALUE2;"). The server can also specify for what
  path the "cookie" should be used for (by specifying "path=value"), when the
  cookie should expire ("expire=DATE"), for what domain to use it
  ("domain=NAME") and if it should be used on secure connections only

  If you've received a page from a server that contains a header like:
        Set-Cookie: sessionid=boo123; path="/foo";

  it means the server wants that first pair passed on when we get anything in
  a path beginning with "/foo".

  Example, get a page that wants my name passed in a cookie:

        curl -b "name=Daniel" www.sillypage.com

  Curl also has the ability to use previously received cookies in following
  sessions. If you get cookies from a server and store them in a file in a
  manner similar to:

        curl --dump-header headers www.example.com

  ... you can then in a second connect to that (or another) site, use the
  cookies from the 'headers' file like:

        curl -b headers www.example.com

  While saving headers to a file is a working way to store cookies, it is
  however error-prone and not the preferred way to do this. Instead, make curl
  save the incoming cookies using the well-known netscape cookie format like

        curl -c cookies.txt www.example.com

  Note that by specifying -b you enable the "cookie awareness" and with -L
  you can make curl follow a location: (which often is used in combination
  with cookies). So that if a site sends cookies and a location, you can
  use a non-existing file to trigger the cookie awareness like:

        curl -L -b empty.txt www.example.com

  The file to read cookies from must be formatted using plain HTTP headers OR
  as netscape's cookie file. Curl will determine what kind it is based on the
  file contents.  In the above command, curl will parse the header and store
  the cookies received from www.example.com.  curl will send to the server the
  stored cookies which match the request as it follows the location.  The
  file "empty.txt" may be a nonexistent file.

  Alas, to both read and write cookies from a netscape cookie file, you can
  set both -b and -c to use the same file:

        curl -b cookies.txt -c cookies.txt www.example.com


  The progress meter exists to show a user that something actually is
  happening. The different fields in the output have the following meaning:

  % Total    % Received % Xferd  Average Speed          Time             Curr.
                                 Dload  Upload Total    Current  Left    Speed
  0  151M    0 38608    0     0   9406      0  4:41:43  0:00:04  4:41:39  9287

  From left-to-right:
   %             - percentage completed of the whole transfer
   Total         - total size of the whole expected transfer
   %             - percentage completed of the download
   Received      - currently downloaded amount of bytes
   %             - percentage completed of the upload
   Xferd         - currently uploaded amount of bytes
   Average Speed
   Dload         - the average transfer speed of the download
   Average Speed
   Upload        - the average transfer speed of the upload
   Time Total    - expected time to complete the operation
   Time Current  - time passed since the invoke
   Time Left     - expected time left to completion
   Curr.Speed    - the average transfer speed the last 5 seconds (the first
                   5 seconds of a transfer is based on less time of course.)

  The -# option will display a totally different progress bar that doesn't
  need much explanation!


  Curl allows the user to set the transfer speed conditions that must be met
  to let the transfer keep going. By using the switch -y and -Y you
  can make curl abort transfers if the transfer speed is below the specified
  lowest limit for a specified time.

  To have curl abort the download if the speed is slower than 3000 bytes per
  second for 1 minute, run:

        curl -Y 3000 -y 60 www.far-away-site.com

  This can very well be used in combination with the overall time limit, so
  that the above operation must be completed in whole within 30 minutes:

        curl -m 1800 -Y 3000 -y 60 www.far-away-site.com

  Forcing curl not to transfer data faster than a given rate is also possible,
  which might be useful if you're using a limited bandwidth connection and you
  don't want your transfer to use all of it (sometimes referred to as
  "bandwidth throttle").

  Make curl transfer data no faster than 10 kilobytes per second:

        curl --limit-rate 10K www.far-away-site.com


        curl --limit-rate 10240 www.far-away-site.com

  Or prevent curl from uploading data faster than 1 megabyte per second:

        curl -T upload --limit-rate 1M ftp://uploadshereplease.com

  When using the --limit-rate option, the transfer rate is regulated on a
  per-second basis, which will cause the total transfer speed to become lower
  than the given number. Sometimes of course substantially lower, if your
  transfer stalls during periods.


  Curl automatically tries to read the .curlrc file (or _curlrc file on win32
  systems) from the user's home dir on startup.

  The config file could be made up with normal command line switches, but you
  can also specify the long options without the dashes to make it more
  readable. You can separate the options and the parameter with spaces, or
  with = or :. Comments can be used within the file. If the first letter on a
  line is a '#'-symbol the rest of the line is treated as a comment.

  If you want the parameter to contain spaces, you must enclose the entire
  parameter within double quotes ("). Within those quotes, you specify a
  quote as \".

  NOTE: You must specify options and their arguments on the same line.

  Example, set default time out and proxy in a config file:

#We  want a 30 minute timeout:
        -m 1800
#. .. and we use a proxy for all accesses:
        proxy = proxy.our.domain.com:8080

  White spaces ARE significant at the end of lines, but all white spaces
  leading up to the first characters of each line are ignored.

  Prevent curl from reading the default file by using -q as the first command
  line parameter, like:

        curl -q www.thatsite.com

  Force curl to get and display a local help page in case it is invoked
  without URL by making a config file similar to:

#default  url to get
        url = "http://help.with.curl.com/curlhelp.html"

  You can specify another config file to be read by using the -K/--config
  flag. If you set config file name to "-" it'll read the config from stdin,
  which can be handy if you want to hide options from being visible in process
  tables etc:

        echo "user = user:passwd" | curl -K - http://that.secret.site.com


  When using curl in your own very special programs, you may end up needing
  to pass on your own custom headers when getting a web page. You can do
  this by using the -H flag.

  Example, send the header "X-you-and-me: yes" to the server when getting a

        curl -H "X-you-and-me: yes" www.love.com

  This can also be useful in case you want curl to send a different text in a
  header than it normally does. The -H header you specify then replaces the
  header curl would normally send. If you replace an internal header with an
  empty one, you prevent that header from being sent. To prevent the Host:
  header from being used:

        curl -H "Host:" www.server.com


  Do note that when getting files with the ftp:// URL, the given path is
  relative the directory you enter. To get the file 'README' from your home
  directory at your ftp site, do:

        curl ftp://user:passwd@my.site.com/README

  But if you want the README file from the root directory of that very same
  site, you need to specify the absolute file name:

        curl ftp://user:passwd@my.site.com//README

  (I.e with an extra slash in front of the file name.)


  With sftp: and scp: URLs, the path name given is the absolute name on the
  server. To access a file relative to the remote user's home directory,
  prefix the file with /~/ , such as:

        curl -u $USER sftp://home.example.com/~/.bashrc

FTP and firewalls

  The FTP protocol requires one of the involved parties to open a second
  connection as soon as data is about to get transfered. There are two ways to
  do this.

  The default way for curl is to issue the PASV command which causes the
  server to open another port and await another connection performed by the
  client. This is good if the client is behind a firewall that don't allow
  incoming connections.

        curl ftp.download.com

  If the server for example, is behind a firewall that don't allow connections
  on other ports than 21 (or if it just doesn't support the PASV command), the
  other way to do it is to use the PORT command and instruct the server to
  connect to the client on the given (as parameters to the PORT command) IP
  number and port.

  The -P flag to curl supports a few different options. Your machine may have
  several IP-addresses and/or network interfaces and curl allows you to select
  which of them to use. Default address can also be used:

        curl -P - ftp.download.com

  Download with PORT but use the IP address of our 'le0' interface (this does
  not work on windows):

        curl -P le0 ftp.download.com

  Download with PORT but use as our IP address to use:

        curl -P ftp.download.com


  Get a web page from a server using a specified port for the interface:

        curl --interface eth0:1 http://www.netscape.com/


        curl --interface http://www.netscape.com/


  Secure HTTP requires SSL libraries to be installed and used when curl is
  built. If that is done, curl is capable of retrieving and posting documents
  using the HTTPS protocol.


        curl https://www.secure-site.com

  Curl is also capable of using your personal certificates to get/post files
  from sites that require valid certificates. The only drawback is that the
  certificate needs to be in PEM-format. PEM is a standard and open format to
  store certificates with, but it is not used by the most commonly used
  browsers (Netscape and MSIE both use the so called PKCS#12 format). If you
  want curl to use the certificates you use with your (favourite) browser, you
  may need to download/compile a converter that can convert your browser's
  formatted certificates to PEM formatted ones. This kind of converter is
  included in recent versions of OpenSSL, and for older versions Dr Stephen
  N. Henson has written a patch for SSLeay that adds this functionality. You
  can get his patch (that requires an SSLeay installation) from his site at:


  Example on how to automatically retrieve a document using a certificate with
  a personal password:

        curl -E /path/to/cert.pem:password https://secure.site.com/

  If you neglect to specify the password on the command line, you will be
  prompted for the correct password before any data can be received.

  Many older SSL-servers have problems with SSLv3 or TLS, that newer versions
  of OpenSSL etc is using, therefore it is sometimes useful to specify what
  SSL-version curl should use. Use -3, -2 or -1 to specify that exact SSL
  version to use (for SSLv3, SSLv2 or TLSv1 respectively):

        curl -2 https://secure.site.com/

  Otherwise, curl will first attempt to use v3 and then v2.

  To use OpenSSL to convert your favourite browser's certificate into a PEM
  formatted one that curl can use, do something like this (assuming netscape,
  but IE is likely to work similarly):

    You start with hitting the 'security' menu button in netscape.

    Select 'certificates->yours' and then pick a certificate in the list

    Press the 'export' button

    enter your PIN code for the certs

    select a proper place to save it

    Run the 'openssl' application to convert the certificate. If you cd to the
    openssl installation, you can do it like:

#. /apps/openssl pkcs12 -in [file you saved] -clcerts -out [PEMfile]


 To continue a file transfer where it was previously aborted, curl supports
 resume on http(s) downloads as well as ftp uploads and downloads.

 Continue downloading a document:

        curl -C - -o file ftp://ftp.server.com/path/file

 Continue uploading a document(*1):

        curl -C - -T file ftp://ftp.server.com/path/file

 Continue downloading a document from a web server(*2):

        curl -C - -o file http://www.server.com/

 (*1) = This requires that the ftp server supports the non-standard command
        SIZE. If it doesn't, curl will say so.

 (*2) = This requires that the web server supports at least HTTP/1.1. If it
        doesn't, curl will say so.


 HTTP allows a client to specify a time condition for the document it
 requests. It is If-Modified-Since or If-Unmodified-Since. Curl allow you to
 specify them with the -z/--time-cond flag.

 For example, you can easily make a download that only gets performed if the
 remote file is newer than a local copy. It would be made like:

        curl -z local.html http://remote.server.com/remote.html

 Or you can download a file only if the local file is newer than the remote
 one. Do this by prepending the date string with a '-', as in:

        curl -z -local.html http://remote.server.com/remote.html

 You can specify a "free text" date as condition. Tell curl to only download
 the file if it was updated since January 12, 2012:

        curl -z "Jan 12 2012" http://remote.server.com/remote.html

 Curl will then accept a wide range of date formats. You always make the date
 check the other way around by prepending it with a dash '-'.


  For fun try

        curl dict://dict.org/m:curl
        curl dict://dict.org/d:heisenbug:jargon
        curl dict://dict.org/d:daniel:web1913

  Aliases for 'm' are 'match' and 'find', and aliases for 'd' are 'define'
  and 'lookup'. For example,

        curl dict://dict.org/find:curl

  Commands that break the URL description of the RFC (but not the DICT
  protocol) are

        curl dict://dict.org/show:db
        curl dict://dict.org/show:strat

  Authentication is still missing (but this is not required by the RFC)


  If you have installed the OpenLDAP library, curl can take advantage of it
  and offer ldap:// support.

  LDAP is a complex thing and writing an LDAP query is not an easy task. I do
  advice you to dig up the syntax description for that elsewhere. Two places
  that might suit you are:

  Netscape's "Netscape Directory SDK 3.0 for C Programmer's Guide Chapter 10:
  Working with LDAP URLs":


  RFC 2255, "The LDAP URL Format" http://curl.haxx.se/rfc/rfc2255.txt

  To show you an example, this is now I can get all people from my local LDAP
  server that has a certain sub-domain in their email address:

        curl -B "ldap://ldap.frontec.se/o=frontec??sub?mail=*sth.frontec.se"

  If I want the same info in HTML format, I can get it by not using the -B
  (enforce ASCII) flag.


  Curl reads and understands the following environment variables:

        http_proxy, HTTPS_PROXY, FTP_PROXY

  They should be set for protocol-specific proxies. General proxy should be
  set with


  A comma-separated list of host names that shouldn't go through any proxy is
  set in (only an asterisk, '*' matches all hosts)


  If the host name matches one of these strings, or the host is within the
  domain of one of these strings, transactions with that node will not be

  The usage of the -x/--proxy flag overrides the environment variables.


  Unix introduced the .netrc concept a long time ago. It is a way for a user
  to specify name and password for commonly visited ftp sites in a file so
  that you don't have to type them in each time you visit those sites. You
  realize this is a big security risk if someone else gets hold of your
  passwords, so therefore most unix programs won't read this file unless it is
  only readable by yourself (curl doesn't care though).

  Curl supports .netrc files if told so (using the -n/--netrc and
  --netrc-optional options). This is not restricted to only ftp,
  but curl can use it for all protocols where authentication is used.

  A very simple .netrc file could look something like:

        machine curl.haxx.se login iamdaniel password mysecret


  To better allow script programmers to get to know about the progress of
  curl, the -w/--write-out option was introduced. Using this, you can specify
  what information from the previous transfer you want to extract.

  To display the amount of bytes downloaded together with some text and an
  ending newline:

        curl -w 'We downloaded %{size_download} bytes\n' www.download.com


  Curl supports kerberos4 and kerberos5/GSSAPI for FTP transfers. You need
  the kerberos package installed and used at curl build time for it to be

  First, get the krb-ticket the normal way, like with the kinit/kauth tool.
  Then use curl in way similar to:

        curl --krb private ftp://krb4site.com -u username:fakepwd

  There's no use for a password on the -u switch, but a blank one will make
  curl ask for one and you already entered the real password to kinit/kauth.


  The curl telnet support is basic and very easy to use. Curl passes all data
  passed to it on stdin to the remote server. Connect to a remote telnet
  server using a command line similar to:

        curl telnet://remote.server.com

  And enter the data to pass to the server on stdin. The result will be sent
  to stdout or to the file you specify with -o.

  You might want the -N/--no-buffer option to switch off the buffered output
  for slow connections or similar.

  Pass options to the telnet protocol negotiation, by using the -t option. To
  tell the server we use a vt100 terminal, try something like:

        curl -tTTYPE=vt100 telnet://remote.server.com

  Other interesting options for it -t include:

   - XDISPLOC=<X display> Sets the X display location.

   - NEW_ENV=<var,val> Sets an environment variable.

  NOTE: the telnet protocol does not specify any way to login with a specified
  user and password so curl can't do that automatically. To do that, you need
  to track when the login prompt is received and send the username and
  password accordingly.


  Specifying multiple files on a single command line will make curl transfer
  all of them, one after the other in the specified order.

  libcurl will attempt to use persistent connections for the transfers so that
  the second transfer to the same host can use the same connection that was
  already initiated and was left open in the previous transfer. This greatly
  decreases connection time for all but the first transfer and it makes a far
  better use of the network.

  Note that curl cannot use persistent connections for transfers that are used
  in subsequence curl invokes. Try to stuff as many URLs as possible on the
  same command line if they are using the same host, as that'll make the
  transfers faster. If you use a http proxy for file transfers, practically
  all transfers will be persistent.


  As is mentioned above, you can download multiple files with one command line
  by simply adding more URLs. If you want those to get saved to a local file
  instead of just printed to stdout, you need to add one save option for each
  URL you specify. Note that this also goes for the -O option (but not

  For example: get two files and use -O for the first and a custom file
  name for the second:

    curl -O http://url.com/file.txt ftp://ftp.com/moo.exe -o moo.jpg

  You can also upload multiple files in a similar fashion:

    curl -T local1 ftp://ftp.com/moo.exe -T local2 ftp://ftp.com/moo2.txt


  curl will connect to a server with IPv6 when a host lookup returns an IPv6
  address and fall back to IPv4 if the connection fails. The --ipv4 and --ipv6
  options can specify which address to use when both are available. IPv6
  addresses can also be specified directly in URLs using the syntax:


  When this style is used, the -g option must be given to stop curl from
  interpreting the square brackets as special globbing characters.  Link local
  and site local addresses including a scope identifier, such as fe80::1234%1,
  may also be used, but the scope portion must be numeric and the percent
  character must be URL escaped. The previous example in an SFTP URL might
  look like:


  IPv6 addresses provided other than in URLs (e.g. to the --proxy, --interface
  or --ftp-port options) should not be URL encoded.


  For your convenience, we have several open mailing lists to discuss curl,
  its development and things relevant to this. Get all info at
  http://curl.haxx.se/mail/. Some of the lists available are:


    Users of the command line tool. How to use it, what doesn't work, new
    features, related tools, questions, news, installations, compilations,
    running, porting etc.


    Developers using or developing libcurl. Bugs, extensions, improvements.


    Low-traffic. Only receives announcements of new public versions. At worst,
    that makes something like one or two mails per month, but usually only one
    mail every second month.


    Using the curl functions in PHP. Everything curl with a PHP angle. Or PHP
    with a curl angle.


    Python hackers using curl with or without the python binding pycurl.

  Please direct curl questions, feature requests and trouble reports to one of
  these mailing lists instead of mailing any individual.
Jan 172011

This makes the file “immutable”, so it cannot be changed, deleted, linked to, even to the root user.

-R     Recursively change attributes of directories and their contents.

-V     Be verbose with chattr’s output and print the program version.

-f     Suppress most error messages.

-v version
Set the file’s version/generation number.

When a file with the ‘A’ attribute set is accessed, its atime record is not modified.  This avoids a certain amount of disk I/O for laptop systems.

A file with the `a’ attribute set can only be open in append mode for writing.  Only the superuser or a process possessing the CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

A file with the `c’ attribute set is automatically compressed on the disk by the kernel.  A read from this file returns uncompressed data.  A write to this file compresses data before storing them on the disk.  Note:  please
make sure to read the bugs and limitations section at the end of this document.

When a directory with the `D’ attribute set is modified, the changes are written synchronously on the disk; this is equivalent to the `dirsync’ mount option applied to a subset of the files.

A file with the `d’ attribute set is not candidate for backup when the dump(8) program is run.

The ‘E’ attribute is used by the experimental compression patches to indicate that a compressed file has a compression error.  It may not be set or reset using chattr(1), although it can be displayed by lsattr(1).

The ‘e’ attribute indicates that the file is using extents for mapping the blocks on disk.  It may not be removed using chattr(1).

The ‘I’ attribute is used by the htree code to indicate that a directory is being indexed using hashed trees.  It may not be set or reset using chattr(1), although it can be displayed by lsattr(1).

The  ‘h’  attribute  indicates  the file is storing its blocks in units of the filesystem blocksize instead of in units of sectors, and means that the file is (or at one time was) larger than 2TB.  It may not be set or reset
using chattr(1), although it can be displayed by lsattr(1).

A file with the `i’ attribute cannot be modified: it cannot be deleted or renamed, no link can be created to this  file  and  no  data  can  be  written  to  the  file.   Only  the  superuser  or  a  process  possessing  the
CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

A file with the `j’ attribute has all of its data written to the ext3 journal before being written to the file itself, if the filesystem is mounted with the “data=ordered” or “data=writeback” options.  When the filesystem is
mounted with the “data=journal” option all file data is already journalled and this attribute has no effect.  Only the superuser or a process possessing the CAP_SYS_RESOURCE capability can set or clear this attribute.

When a file with the `s’ attribute set is deleted, its blocks are zeroed and written back to the disk.  Note: please make sure to read the bugs and limitations section at the end of this document.

When a file with the `S’ attribute set is modified, the changes are written synchronously on the disk; this is equivalent to the `sync’ mount option applied to a subset of the files.

A directory with the ‘T’ attribute will be deemed to be the top of directory hierarchies for the purposes of the Orlov block allocator.  This is a hint to the block allocator used by ext3 and  ext4  that  the  subdirectories
under  this  directory  are  not  related,  and thus should be spread apart for allocation purposes.   For example it is a very good idea to set the ‘T’ attribute on the /home directory, so that /home/john and /home/mary are
placed into separate block groups.  For directories where this attribute is not set, the Orlov block allocator will try to group subdirectories closer together where possible.

A file with the ‘t’ attribute will not have a partial block fragment at the end of the file merged with other files (for those filesystems which support tail-merging).  This is necessary for applications such as  LILO  which
read the filesystem directly, and which don’t understand tail-merged files.  Note: As of this writing, the ext2 or ext3 filesystems do not (yet, except in very experimental patches) support tail-merging.

When a file with the `u’ attribute set is deleted, its contents are saved.  This allows the user to ask for its undeletion.  Note: please make sure to read the bugs and limitations section at the end of this document.

The  ‘X’ attribute is used by the experimental compression patches to indicate that a raw contents of a compressed file can be accessed directly.  It currently may not be set or reset using chattr(1), although it can be dis‐
played by lsattr(1).

The ‘Z’ attribute is used by the experimental compression patches to indicate a compressed file is dirty.  It may not be set or reset using chattr(1), although it can be displayed by lsattr(1).

Jan 152011
You can redirect a web browser to another web page using the HTML below. The number 2 tells the brower to wait 2 seconds before it initiates the redirect. Open up a text editor and paste the HTML below into it then save it as index.html or index.htm.
<title>Redirecting to WWW.RobHolland.Com</title>
<body> <meta http-equiv=”refresh” content=”2;url=http://www.robholland.com”>
Jan 042011

Top 10 DOS Batch tips (Yes, DOS Batch…)

From (http://weblogs.asp.net/jgalloway/archive/2006/11/20/top-10-dos-batch-tips-yes-dos-batch.aspx)

PowerShell’s great. I’m fired up about the opportunity to use .NET objects from simple scripts. I’ll admit I’m still getting up to speed with it, but I’m totally sold on PowerShell.

However, it’s not installed on a lot of servers I work with, and I still do a lot of my “clumsy developer attempting DBA and network admin” tasks from DOS Batch files. You can do quite a bit with DOS Batch - the silly fact is the my most popular posts (by a huge margin) are some batch scripts to allow running IE7 and IE6 on the same computer.

So, by way of tribute to the dying art of the DOS Batch file, I present my top ten batch file tricks:

  1. Use PUSHD / POPD to change directories
    Read Scott Hanselman’s writeup on PUSHD. The basic idea is that it keeps a stack, so at the simplest level you can do something like this:
  2. PUSHD “C:\Working Directory\”


    That allows you to call the batch file from any directory and return to the original directory when you’re done. The cool thing is that PUSHD can be nested, so you can move all over the place within your scripts and just POPD your way out when you’re done.

  4. Call FTP scripts
    This sample prompts for the username and password, but they can of course be hardcoded if you’re feeling lucky.
  5. set FTPADDRESS=ftp.myserver.com
  6. set SITEBACKUPFILE=FileToTransfer.zip
  7. set /p FTPUSERNAME=Enter FTP User Name:
  8. set /p FTPPASSWORD=Enter FTP Password:
  9. CLS
  10. > script.ftp USER
  11. >>script.ftp ECHO %FTPUSERNAME%
  12. >>script.ftp ECHO %FTPPASSWORD%
  13. >>script.ftp ECHO binary
  14. >>script.ftp ECHO prompt n
  15. :: Use put instead of get to upload the file
  16. >>script.ftp ECHO get %SITEBACKUPFILE%
  17. >>script.ftp ECHO bye
  18. FTP -v -s:script.ftp %FTPADDRESS%
  19. TYPE NUL >script.ftp

    DEL script.ftp

  20. Read from the registry
    You can make creative use of the FOR command to read from and parse a registry value (see my previous post for more info).

    FOR /F “tokens=2* delims= ” %%A IN (‘REG QUERY “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\Instance Names\SQL” /v SQL2005′) DO SET SQLINSTANCE=%%B

  21. Run SQL Commands
    You can call OSQL (or SQLCMD on servers with SQL 2005 installed) to execute SQL commands:


  22. Check if a file or folder exists
    I used this to do a quick and dirty check to see if a Windows Hotfix had been installed in my IE7 Standalone scripts:
  23. IF EXIST %SystemRoot%\$NtUninstallKB915865$\ GOTO KB_INSTALLED
  24. ECHO Installing Hotfix (KB915865) to allow tab support

    START /D “%~dp0/Installation/Update/” xmllitesetup.exe

  25. Pause execution for a number of seconds
    There are different ways to do this from within a batch file, all with their tradeoffs. I use a ping to an invalid IP address with a timeout. The best way to do this is to find an invalid IP address and then pint it, but is a pretty safe bet:
  26. ECHO Waiting 15 seconds

    PING -n 1 -w 15000 > NUL

  27. Use defaults for optional parameters
    It’s not really easy to check for a missing parameter. You have to use something like ”IF dummy==%1dummy”, which will only be true if %1 is empty. So, for example, here we’re allowing a user to supply an application path via the third parameter, and defaulting it if it’s missing. By the way, beware the IF syntax. The line spacing makes a difference, so this is one that I just copy and paste to avoid figuring it out every time.
  28. IF dummy==dummy%3 (
  29. SET APPLICATIONPATH=”C:\Program Files\MyApp\”
  30. ) ELSE (


  32. Process each file matching a pattern in a directory
    I previously posted a script which iterates all files named *.bak in a directory and restores them on the local instance of SQL Server. Here’s an excerpt:
  34. FOR %%A in (*.bak) do CALL :Subroutine %%A
  35. POPD
  36. GOTO:EOF
  37. :Subroutine
  38. set DBNAME=%~n1


  40. Use batch parameter expansion to avoid parsing file or directory info
    Batch file parameters are read as %1, %2, etc. DOS Command Extensions – available on Windows 2000 and up – add a lot of automatic parsing and expansion that really simplifies reading filenames passed in as parameters. I originally put this at the top of the list, but I moved it because I figured the insane syntax would drive people off. I wrote a simple batch script that shows some examples. I think that makes it a little more readable. Stick with me, I think this is one of the best features in DOS batch and is worth learning.

    First, here’s the batch file which just echos the processed parameters:

    @echo off

    echo %%~1 = %~1

    echo %%~f1 = %~f1

    echo %%~d1 = %~d1

    echo %%~p1 = %~p1

    echo %%~n1 = %~n1

    echo %%~x1 = %~x1

    echo %%~s1 = %~s1

    echo %%~a1 = %~a1

    echo %%~t1 = %~t1

    echo %%~z1 = %~z1

    echo %%~$PATHATH:1 = %~$PATHATH:1

    echo %%~dp1 = %~dp1

    echo %%~nx1 = %~nx1

    echo %%~dp$PATH:1 = %~dp$PATH:1

    echo %%~ftza1 = %~ftza1

    Now we’ll call it, passing in “C:\Windows\Notepad.exe” as a parameter:

    C:\Temp>batchparams.bat c:\windows\notepad.exe

    %~1 = c:\windows\notepad.exe


    %~d1 = c:

    %~p1 = \WINDOWS\

    %~n1 = NOTEPAD

    %~x1 = .EXE


    %~a1 = –a——

    %~t1 = 08/25/2005 01:50 AM

    %~z1 = 17920

    %~$PATHATH:1 =

    %~dp1 = c:\WINDOWS\

    %~nx1 = NOTEPAD.EXE

    %~dp$PATH:1 = c:\WINDOWS\

    %~ftza1 = –a—— 08/25/2005 01:50 AM 17920 c:\WINDOWS\NOTEPAD.EXE

    As I said, the syntax is completely crazy, but it’s easy to look them up – just type HELP CALL at a DOS prompt; it gives you this:

    %~1 – expands %1 removing any surrounding quotes (“)
    %~f1 – expands %1 to a fully qualified path name
    %~d1 – expands %1 to a drive letter only
    %~p1 – expands %1 to a path only
    %~n1 – expands %1 to a file name only
    %~x1 – expands %1 to a file extension only
    %~s1 – expanded path contains short names only
    %~a1 – expands %1 to file attributes
    %~t1 – expands %1 to date/time of file
    %~z1 – expands %1 to size of file
    %~$PATH:1 – searches the directories listed in the PATH environment variable and expands %1 to the fully qualified name of the first one found. If the environment variable name is not defined or the file is not found by the search, then this modifier expands to the empty string

    The modifiers can be combined to get compound results:

    %~dp1 – expands %1 to a drive letter and path only
    %~nx1 – expands %1 to a file name and extension only
    %~dp$PATH:1 – searches the directories listed in the PATH environment variable for %1 and expands to the drive letter and path of the first one found.
    %~ftza1 – expands %1 to a DIR like output line

    In the above examples %1 and PATH can be replaced by other valid values. The %~ syntax is terminated by a valid argument number. The %~ modifiers may not be used with %*

  41. Learn from the masters
    By far, my favorite resource for DOS Batch trickery is the Batch Files section of Rob van der Woude’s Scripting Pages. He’s got some good PowerShell resources, too.

What about you? Got any favorite DOS Batch tricks?

Published Monday, November 20, 2006 12:43 AM by Jon Galloway

Filed under: Tips / Tricks, General Software Development


# Jon Rowett&#8217;s Workblog &raquo; Links for 20 November 2006

PingBack from http://workblog.jonrowett.com/index.php/2006/11/20/links-for-20-november-2006/

Monday, November 20, 2006 10:07 AM by Jon Rowett’s Workblog » Links for 20 November 2006

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

PUSHD and POPD are great.  An additional advantage over CD is the fact that including a drive letter changes to the drive and directory specified whereas CD just changes the active directory on the specified drive.

If you use them a lot you can save a fair bit of typing by defining two one-line command files +.cmd and -.cmd somewhere on your path.  They simply contain;


 @pushd %1



Now you can just run + <dir> to enter a directory and – to return.

Monday, November 20, 2006 10:42 AM by Steve Crane

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

one more that I just recalled, from reading Steve’s comment

cd /d <driveletter:\directory>

changes both, the directory and the drive letter

Monday, November 20, 2006 12:25 PM by Eber Irigoyen

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Very good!

And this tip: “Pause execution for a number of seconds” Gosh! Why didn’t I think of it before?

Thanks for all these tips!



Tuesday, November 21, 2006 11:07 AM by Cleydson

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

sleep 15 seconds:

sleep 15

Wednesday, November 29, 2006 1:25 PM by oscar

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

@oscar – The sleep command isn’t available on a default install. It’s part of the Windows 2003 Resource Kit, which is a separate download.

Wednesday, November 29, 2006 2:08 PM by Jon Galloway

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

I love using the findstr.exe that is built into Windows XP and later… it’s closer to “grep” than the original “find” and the built in ability to search subdirectories is a real gift.


Sunday, February 25, 2007 7:07 PM by Andrew from Vancouver

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Tip #8 “Use batch parameter expansion to avoid parsing file or directory info” was just what I was looking for!

So what if the syntax is “insane”? (No more so, than, say, printf formatting syntax in C.)

Anyway it’s easy to copy/paste what I want from your page, or, as you taught me, from CALL HELP at DOS command prompt.

I think it should be tip #1 again …

Wednesday, April 18, 2007 4:11 PM by Tom Harris

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Oops. I meant

Tip #9 “Use batch parameter expansion to avoid parsing file or directory info” was just what I was looking for!

Thursday, April 19, 2007 7:26 AM by Tom Harris

# Rhonda Tipton&#8217;s WebLog Web Links 11.21.2006 &laquo;

Pingback from  Rhonda Tipton&#8217;s WebLog Web Links 11.21.2006 &laquo;

Wednesday, May 16, 2007 11:18 PM by Rhonda Tipton’s WebLog Web Links 11.21.2006 «

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

how do i put a automatic yes in (Y/N)option

Wednesday, January 16, 2008 3:38 PM by filipo111

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


echo N | del .

Thursday, January 24, 2008 8:10 AM by Alexander

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Great tips!

How do I use xcopy to search for and copy say, word files, scatterded over a drive.  Also if none present then move on to next command.  Right now I have:

X:\XCOPY.exe C:\*.doc “X:\Word Files” /s/e/v/i/y/h

This command string copies the file directory structure which takes forever and something I do not want.  Just looking to pin point files (ie word or microsoft money – *.mny) and copy them.

Thanks,  Matt


Friday, February 22, 2008 9:04 PM by Matt

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Have SQL script and DOS batch script in same file:


Monday, March 17, 2008 12:57 AM by dosrocks

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Pause for x number of seconds:

ping -n x localhost

Wednesday, April 09, 2008 2:05 PM by Todd Carey

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


I’m trying to automatically run a .reg file through a batch file, but need to find out how the “Yes/No” and “OK” pop ups can be avoided and automatically accepted so the user doesn’t have to click on Yes and OK everytime.

example of my batchfile; let’s say the .bat file is located on the X-drive:



Thanks in advance, if anybody is able to help me out!


Wednesday, April 16, 2008 4:01 AM by Dom Peeters

# Resell Rights

Go to Port Sarim, west of Draynor village, and ask one of the people in the blue uniforms to go to Karamja and pay them 30 runescape gp. When you get there, walk off the dock and you should see a house. Enter the house and talk to a man named Luthas.

Wednesday, May 14, 2008 9:20 AM by Resell Rights

# business income opportunity xango

I have one and it is” COMPLETE RUBBISH” ok not complete it looks good. Other than that almost every other phone I have had in the last 3 years and I have had 3, last being the blackberry perl, has done a better job than the iphone. you cant even sync

Thursday, June 26, 2008 7:35 PM by business income opportunity xango

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

hey to make an alarm with a batch file juss put:

set /a test=60

ech %test%

set /a test=%test%-1

echop %test%

repeat this several time and keep a sstop watch handy.


Wednesday, July 09, 2008 6:46 PM by jimmy

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


To get a Reg file put in without the Popup

try this

regedit /s file.reg



>I’m trying to automatically run a .reg >file .through a batch file, but need to find >out how the “Yes/No” and “OK” pop ups can be >avoided and automatically accepted so the >user doesn’t have to click on Yes and OK >everytime.


>example of my batchfile; let’s say the .bat >file is located on the X-drive:





>Thanks in advance, if anybody is able to help >me out!



Wednesday, August 20, 2008 3:28 PM by Jim

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

How do i output any errors to a txt file so i can see which ftp’s failed?

Friday, August 29, 2008 6:19 AM by Rudi

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Do yourself a favor; install Cygwin and write PERL scripts.  INFINITELY more powerful than DOS batch, and considerably easier to write and read too.  It’s free and there is a large body of knowledge to draw upon for writing more aggressive scripts, including numerous well-written books (Programming with PERL, PERL Cookbook, etc.).

For anything more than chaining a few commands together, PERL blows away DOS batch.  This is one of the reasons why DOS batch is a dying “art”.  Another reason is that DOS batch was obsolete the day it was released, as Unix shell scripting languages vastly superior to DOS batch existed before DOS was born.  But that’s a different story…

Friday, August 29, 2008 2:34 PM by Lynwood Hines

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Is there a way to get the Current file name in the batch file?

I am running a batch file: testing123.bat

Is there a way to get “testing123.bat” in a variable?

I use %date% and %time% but have not found a way to pick up the currently running file name.



Tuesday, September 02, 2008 6:20 PM by Frank

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

@Frank, try using %0.

Tuesday, September 23, 2008 7:21 PM by Frode

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Any ideas how I could extract a string from a %

1 parameter, eg: reading “123″ or “45″ from “12345″?



Tuesday, October 07, 2008 9:13 AM by Jamie

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)



set test=12345

echo %test:~0,3%

echo %test:~3,2%

Tuesday, October 14, 2008 3:22 AM by Pablo

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Hey guys, total bat noob here.  I’ve got a dilemma that seems straightforward to me, but bumbling through it has been anything but.  I have a drive  mapped to a remote server (Z drive) and a duplicate drive on my local (called “S”).  Right now, like a chump, I’m busy manually copying back and forth files that get updated (since the soft I’m working with needs these objects in their proper dirs).  What sort of commands would I use where I could select 1 or more files that have been newly created on the mapped “Z” and right click and tell it to copy local to my mirrored directory (and automatically building the folder tree if it doesn’t exist)?  I think I’ve found out how to add things to the windows right click context menu, but I can’t figure out how to pass the name and directory of selected files to a cmd prompt!  Great tips BTW, and thanks in advance anyone for help!  (Oh, and the files are 100mb+ and scattered among 100′s of dir’s, so syncing programs aren’t too useful to me.  I get an update that a certain file is changed by the client and I hand copy individually.  Only way to do it while keeping bandwidth overhead to a minimum.)

Monday, October 20, 2008 3:27 AM by Joel Noob

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Noob – call robocopy from your batch file, it just works.

Wednesday, October 22, 2008 12:20 PM by Jim

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Regarding “9: Use batch parameter expansion…”

One other thing to note is that it can be combined into a “for” statement to do lots of magic:

for %I in (text.txt) do echo %I is %~zI bytes

for %I in (test.bat) do echo: %~$PATH:I

This one seems to only work for UPPERCASE, single-letter variable names, and only for those at the start of the alphabet.  Your mileage may vary.

Thursday, October 23, 2008 8:54 AM by Guido

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Hi Jon, In #3 “Read from the registry”, you mention a previous post in reference to “creative use of the FOR command”.  I looked through your archives, and can’t find the one you’re talking about.  Do you remember which it is?  thanks! Rob

Friday, November 21, 2008 8:26 AM by Rob Flum

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


Monday, December 29, 2008 5:05 PM by nick_rolsit

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Hi, Joel Noob Try xcopy, I think it will do what you want. It even has an exclude list included :)

Friday, January 16, 2009 1:03 AM by A.Wombat

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


Is it possible to open a ‘browse for file’ window from a batch script, select a file and then inject the path/name of that choosen file back into the script ?

Tuesday, May 05, 2009 4:53 AM by Meetoo

# TOP 10 dicas sobre DOS – Cleydson Silva – PontoNetPT

Pingback from  TOP 10 dicas sobre DOS – Cleydson Silva – PontoNetPT

Sunday, June 28, 2009 8:28 PM by TOP 10 dicas sobre DOS – Cleydson Silva – PontoNetPT

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Is there any way to delete all files and sub-folders (may with files too) of a given folder?

Monday, August 17, 2009 4:46 AM by Aaron

# SCCM Java package and DOS fun &laquo; Movement3&#039;s Blog

Pingback from  SCCM Java package and DOS fun &laquo; Movement3&#039;s Blog

Monday, August 17, 2009 11:35 PM by SCCM Java package and DOS fun « Movement3′s Blog

# How to get paths from file path with CMD &laquo; Jawor92&#039;s Blog

Pingback from  How to get paths from file path with CMD &laquo; Jawor92&#039;s Blog

Tuesday, November 24, 2009 5:06 PM by How to get paths from file path with CMD « Jawor92′s Blog

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

how do I remove the quotes from a passed parameter?


batchfile has the line –> echo %1 moon

call it with batchfile.bat “over the ”

and the result is:-

“over the “moon

One needs the quotes to get the variable but then the variable includes the quotes!

Thursday, January 21, 2010 3:48 AM by david

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

oops… found it:-

%~1 – expands %1 removing any surrounding quotes (“)

echo %~1 moon

Works fine.

Thanks for making this info available.

Monday, January 25, 2010 7:35 AM by david

# Admin Helper &laquo; Klaus&#039; Blog

Pingback from  Admin Helper &laquo; Klaus&#039; Blog

Wednesday, February 24, 2010 7:37 AM by Admin Helper « Klaus’ Blog

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Nice blog. Very healthy discussion.

To upload using FTP an entire folder full of files and subfolders, try this script.


It even creates subfolders as necessary. Will mirror the entire local folder to the FTP server.

Tuesday, March 09, 2010 4:46 PM by Sen2008

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


set PATH_VER=c:\folder1\folder2\folder3\file.bat

In “file.bat”, I whould like to obtain the string “c:\folder1″

I mean how to get up two level from the location of the file.bat ?

I used %~dp0 , %~dp1 (twice)  but I didn’t succeed to do it properly

Any Idea?

Thank you

Tuesday, March 30, 2010 11:51 AM by Hendawi

# Odyssey Service Honda Parts, 06 Honda Odyssey Problems

Pingback from  Odyssey Service Honda Parts, 06 Honda Odyssey Problems

Thursday, May 20, 2010 9:36 PM by Odyssey Service Honda Parts, 06 Honda Odyssey Problems

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

I have a little problem that I cannot solve. I have a part solution but need a little help to finish it off!

My first (successful) step was to create a batch file that reads a plain text file (directory.txt) that contains the name of a new directory that I want creating, then the batch file creates it.

e.g. in the “directory.txt” file …

My New Directory Name

(no quotes in the file)

Batch file:

FOR /f “tokens=*” %%n IN (directory.txt) DO MKDIR “%%n”

The reason for doing this is that the directory name can contain spaces, and enclosing the string in quotes does not work for MKDIR in a batch file. It works at a prompt, but not batch.

Now what I want to achieve is to pass the full directory name to the batch file as an argument %1, but I cannot figure out how to replace the “IN (directory.txt)” with an appropriate entry using the %1.  How do I do that?


Saturday, June 05, 2010 4:30 PM by Mr Incredible

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Any ideas how I could extract a string from a %1 parameter, eg: reading “123″ or “45″ from “12345″?

Again, from a parameter, not from a variable!!

Thanks in advance

Wednesday, June 16, 2010 12:00 AM by Fuintis

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Hi again:

Any ideas how i could trim some string from a parameter (like %1)

I need the following behaviour using “%1″ instead of “%variable%”:

set dummy=-test


The prompt output is:

test (without the “-”)


Wednesday, June 16, 2010 12:41 AM by Fuintis

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

echo N | del   is not working

Monday, June 21, 2010 11:50 AM by sajith

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Hi, the URL of Rob van der Woude’s Scripting Pages change. Now all of them are PHP pages.


This is the new one, if you want to update it.

Friday, July 09, 2010 8:04 AM by Adin

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

It was rather interesting for me to read that blog. Thanks for it. I like such topics and anything that is connected to this matter. I definitely want to read more soon. BTW, rather good design that site has, but don’t you think it should be changed every few months?

David Smith

<a href=”http://www.baccaratgirls.com”>exclusive escorts</a>

Tuesday, August 03, 2010 7:47 PM by David Smith

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Interesting post as for me. It would be great to read something more about this matter. The only thing this blog needs is some pics of some gizmos.

Alex Karver

<a href=”www.jammer-store.com/”>cell phone jamer</a>

Friday, August 06, 2010 5:34 AM by BlogSearcher

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

How do I display empty line from batch file?

Tuesday, August 31, 2010 10:28 PM by Raj

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

Keep on posting such themes. I love to read stories like that. BTW add more pics :)

Friday, September 03, 2010 3:08 PM by winterthur escort

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

to all those asking how to apply the text replacement or extraction to a parameter: just assign it to a variable and then use the instructions as abive

  set param1=%1


Thursday, November 11, 2010 2:46 PM by Mars the Infomage

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)

One thing I know,that is I know nothing.


Sunday, December 19, 2010 10:03 AM by top ipad accessories

# re: Top 10 DOS Batch tips (Yes, DOS Batch…)


Can I just say what a relief to find someone who actually is aware of what theyre speaking about within the net. You certainly know how you can provide an concern to light  and make it essential. More men and women need to learn this and recognize this aspect of the story. I cant consider youre not a lot more common mainly because you undoubtedly  have the present.

Jan 012011

From the command line enter the following to install uuencode/uudecode on Fedora Linux: yum -y install sharutils

Email a file named datafile.tar.gz:

Type uuencode command as follows:

$ uuencode datafile.tar.gz datafile.tar.gz | mailx -s “My Data File” user@yourcorp.com

The file name “datafile.tar.gz” appears twice on the uuencode command line. There must be two names. The second one is the name of the file when it is decoded.

Email a photo along with a text message:

Type the command as follows;

$ (cat information.txt; uuencode photo.jpg photo.jpg) | mail -s “Subject” user@domain.com

Email multiple attachments in a single email:

Type the command as follows:

$ uuencode r1.tar.gz r1.tar.gz > /tmp/mailfile.out

$ uuencode r2.tar.gz r2.tar.gz >> /tmp/mailfile.out

$ uuencode r3.tar.gz r3.tar.gz >> /tmp/mailfile.out

$ cat email-body.txt >> /tmp/mailfile.out

$ mail -s “Multiple Files” user@domain.com < /tmp/mailfile.out

Here is a function that I created to uue a file then mail it to a recipient. To use it all you have to do is paste this function in your .profile then reload your profile. At the command prompt type: UUE filename.xxx person@example.com

#uue a file then email it.
UUE() {
if [ $# -eq 0 ]
echo Usage: UUE filename.xxx person@example.com
uuencode $1 $1 | mailx -s “$1″ $2

To uudecode a file simply type: uudecode filename