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GNU Parallel 20100722 released

Item posted by Ole Tange <tange> on Thu Jul 22 18:36:18 2010.

GNU Parallel 20100722 has been released. It is available for
download at:

New in this release:

  • Arguments can now be given on the command line. Example:

parallel bzip2 ::: *.txt

  • xapply like functionality. Example:

parallel diff {1} {2} :::: filelist1 filelist2
parallel diff {1} {2} ">"{1.}-{2.}.diff :::: filelist1 filelist2

  • Arch Linux package. Thanks to Peter Simons <simons at cryp dot to>
  • Mandriva package. Thanks to Sandro Cazzaniga <kharec at mandriva dot org>
  • -L -l -n -s now implies -X unless -m is set

About GNU Parallel

GNU Parallel is a shell tool for executing jobs in parallel using one
or more machines. 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 in parallel. If you use ppss or pexec you will find GNU Parallel
will often make the command easier to read.

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.

You can find more about GNU Parallel at:

Watch the intro video on or
at and


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