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Id: #9478
System Name: parallel
Name: GNU Parallel
Group Type: Official GNU software

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This project is part of the GNU Project.

NAME

parallel - build and execute shell command lines from standard input in parallel

DESCRIPTION

GNU parallel is a shell tool for executing jobs concurrently locally or using remote computers. A job is typically a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables.

If you use xargs today you will find GNU parallel very easy to use as GNU parallel is written to have the same options as xargs. If you write loops in shell, you will find GNU parallel may be able to replace most of the loops and make them run faster by running several jobs simultaneously.

GNU parallel makes sure output from the commands is the same output as you would get had you run the commands sequentially. This makes it possible to use output from GNU parallel as input for other programs.

For each line of input GNU parallel will execute  command  with the line as arguments. If no  command  is given, the line of input is executed. Several lines will be run in parallel. GNU parallel can often be used as a substitute for xargs or cat | bash.

Before looking at the options you may want to check out the examples after the list of options. That will give you an idea of what GNU parallel is capable of.

EXAMPLES

You may want to watch the intro video for a quick introduction: http://www.youtube.com/watch?v=OpaiGYxkSuQ

Go through the tutorial http://www.gnu.org/software/parallel/parallel_tutorial.html or
see the man page or https://www.gnu.org/software/parallel/man.html#EXAMPLE:-Working-as-xargs--n1.-Argument-appending
for more examples.

Registration Date: Mon 27 Aug 2007 02:16:53 PM UTC
License: GNU General Public License v3 or later
Development Status: 5 - Production/Stable

 

Latest News rss feed
GNU Parallel 20220522 ('NATO') released
     posted by tange, Sun 22 May 2022 01:25:48 PM UTC - 0 replies

GNU Parallel 20220522 ('NATO') has been released. It is available for download at: lbry://@GnuParallel:4

Quote of the month:

  It's amazing how fast you can get with bash pipelines and GNU Parallel.
    -- Eric Pauley @EricPauley_ ...


[Read more]
GNU Parallel 20220422 ('Буча') released
     posted by tange, Sat 23 Apr 2022 11:19:46 AM UTC - 0 replies

GNU Parallel 20220422 ('Буча') has been released. It is available for download at: lbry://@GnuParallel:4

Quote of the month:

  Immensely useful which I am forever grateful that it exists.
    -- AlexDragusin@ycombinator ...


[Read more]
GNU Parallel 20220322 ('Маріу́поль')
     posted by tange, Tue 22 Mar 2022 10:29:36 PM UTC - 0 replies

GNU Parallel 20220322 ('Маріу́поль') has been released. It is available for download at: lbry://@GnuParallel:4

Quote of the month:

  My favorite software, ever. Keep the good work.
    -- Federico Alves @federicoalves@twitter ...


[Read more]
GNU Parallel 20220222 ('Donetsk Luhansk')
     posted by tange, Wed 23 Feb 2022 06:32:00 PM UTC - 0 replies

GNU Parallel 20220222 ('Donetsk Luhansk') has been released. It is available for download at: lbry://@GnuParallel:4

This release has a major change in the remote code. This makes this release beta quality.

Quote of the month:

  I also prefer gnu parallel. Mainly because it makes embarrassingly ...


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