GNU Parallel - Summary
This software 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
posted by tange, Mon 22 May 2023 08:31:29 PM UTC
Subject: GNU Parallel 20230522 ('Charles') released [stable]
GNU Parallel 20230522 ('Charles') has been released. It is available for download at: lbry://@GnuParallel:4
Quote of the month:
Recently learned how to use GNU parallel (from ChatGPT, no less!) and I've gone mad with power
[...]
posted by tange, Sat 22 Apr 2023 08:36:54 PM UTC
GNU Parallel 20230422 ('Grand Jury') has been released. It is available for download at: lbry://@GnuParallel:4
Quote of the month:
parallel might be one of the best utilities out there
-- @ThePrimeagen@twitter ThePrimeagen
[...]
posted by tange, Thu 23 Mar 2023 12:12:18 AM UTC
GNU Parallel 20230322 ('Arrest Warrant') has been released. It is available for download at: lbry://@GnuParallel:4
Quote of the month:
GNU parallel is magic, half of my work uses it, to the point where they're referenced and thanked in my thesis
[...]
posted by tange, Wed 22 Feb 2023 10:41:20 PM UTC
GNU Parallel 20230222 ('Gaziantep') has been released. It is available for download at: lbry://@GnuParallel:4
Quote of the month:
Praise GNU parallel, though. That gets me pretty far.
-- Your Obed. Servant, J. B. @Jeffinatorator
[...]

