perl

The Perl 5 language interpreter. More information: https://www.perl.org.

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

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

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

perldoc perlrun ; perldoc module ; perldoc -f splice; perldoc -q perlfaq1