For Ubuntu v17.04 (“Zesty Zapus”) and Debian v9 (“Stretch”), (2017 or newer), or distros based upon those versions, please read Bryan Larsen’s answer first, which should be sufficient.
For versions from before 2017, read on…
dpkg to force the install; parallel gets along nicely with moreutils — it renames moreutils‘
parallel util to
parallel.moreutils. When the install is done both programs (GNU and moreutils) are available.
NB: if any user scripts call the old moreutils
parallel, change those scripts to use the longer name.
Details: Fetch parallel package (without installing or removing anything). Then using
bash internal command), find parallel package in archive. If there’s more than one, use the latest. Force that package to install, despite conflicts.
apt-get --assume-yes --download-only install parallel && ls --sort=version $(compgen -f /var/cache/apt/archives/parallel) | tail -n 1 | xargs dpkg --force-conflicts -i
How to view the resulting diversions:
dpkg-divert --list 'par*'
diversion of /usr/share/man/man1/parallel.1.gz to /usr/share/man/man1/parallel.moreutils.1.gz by parallel diversion of /usr/bin/parallel to /usr/bin/parallel.moreutils by parallel
See how both binary executables are available:
compgen -c parallel | xargs which | xargs ls -l
-rwxr-xr-x 1 root root 240814 Oct 31 2014 /usr/bin/parallel -rwxr-xr-x 1 root root 10592 Jul 21 2015 /usr/bin/parallel.moreutils
This conflict is solved in Ubuntu 17.04 and Debian Stretch.
If you install parallel & moreutils you get the GNU
/usr/bin/parallel and moreutil‘s
/usr/bin/parallel.moreutils. If you only install moreutils, it provides
If you’re using an older version of Ubuntu or Debian, you could download and install the .deb’s from a newer version: they install & work just fine.
I guess, the easiest route would be to install one of the packages normally (e.g.
parallel) and just extract another one to the custom path:
$ sudo apt-get install libio-pty-perl libipc-run-perl $ sudo apt-get download moreutils $ dpkg -x moreutils_0.54-1_amd64.deb /tmp/moreutils $ cd /tmp/moreutils/usr/bin/
GNU parallels is just a perl script, so you could just copy it somewhere useful (e.g. /usr/local/bin/gnu-parallel).
(Just check the perl dependencies).