GNU Parallel

GNU parallel is useful for running multiple processes over an input list, similar to xargs.

Usage

parallel tutorial

Replacement strings

Parallel includes a handful of default replacement strings:

--rpl '{} '
--rpl '{#} $_=$job->seq()'
--rpl '{%} $_=$job->slot()'
--rpl '{/} s:.*/::'
--rpl '{//} $Global::use{"File::Basename"} ||=
         eval "use File::Basename; 1;"; $_ = dirname($_);'
--rpl '{/.} s:.*/::; s:\.[^/.]+$::;'
--rpl '{.} s:\.[^/.]+$::'

Parent dirname

--rpl '{//} s:.*/(.*)/[^/]*:\1:;'