DOT-Files/Gentoo/gentooamd/home/user/.tldrc/tldr/pages/common/perl.md

perl

The Perl 5 language interpreter. See also: perldoc. More information: https://perldoc.perl.org/perl.

• Print lines from stdin [m]atching regex1 and case [i]nsensitive regex2:

perl -n -e 'print if m/regex1/ and m/regex2/i'

• Say ([-E]) first match group, using a regex, ignoring space ([x]) in regex:

perl -n -E 'say $1 if m/{{before}} ( {{group_regex}} ) {{after}}/x'

• [i]n-place, with backup, [s]ubstitute all occurrence ([g]) of regex with a replacement:

perl -i'.bak' -p -e 's/regex/{{replacement}}/g' {{path/to/files}}