This script is for Slackware 12.1 and may be outdated.

SlackBuilds Repository

12.1 > System > par2cmdline (0.4)

par2cmdline (Commandline implementation of PARv2.0 specification)

par2cmdline is a GPL-licensed commandline tool for creating and using PAR2
parity sets to detect damage in files and repair them if necessary. The
program uses Reed Solomon Coding to perform its error correction. A useful
program for checking and ensuring the integrity of binaries retrieved from
usenet for instance.

This program, or it's argued gcc, has compile issues which result in a
"Warning: ignoring..." messages during the build process. This problem is
known and was made a gcc bug, which was shortly fixed. From what I know,
this issue does not affect the actual compilation of the program.

For information on the issue see these messages:

There is also current work being done on a par2 library extracted from
par2cmdline called libpar2 and is available at
However, since it still contains the original par2cmdline, it has the same
compilation issue.

On a side note, par2cmdline in combination with unrar (available here on can be used by the python program hellanzb to make getting,
verifying and unraring files with a nzb file almost totally hands-free.
For more information see:

This includes a patch to make par2cmdline work with GCC 4.x.x

Maintained by: maldoror
Keywords: parity,usenet,par2,pararchive
ChangeLog: par2cmdline


Source Downloads:
par2cmdline-0.4.tar.gz (1551b63e57e3c232254dc62073b723a9)

Download SlackBuild:
par2cmdline.tar.gz.asc (FAQ)

(the SlackBuild does not include the source)

Validated for Slackware 12.1

See our HOWTO for instructions on how to use the contents of this repository.

Access to the repository is available via:
ftp git cgit http rsync

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