Regular Expressions 101

test

fsdfsd

eee

This can be used to find all zone files that contain authoritative nameservers - e.g. perl -ne 'print if /^([\w.]+\.)\s+.+\sNS\s.+\1/' /var/named/*.db | awk '{print $1}' | sort | uniq

Remove repeated elements from a plain JSON array.

Filter selfmon events by user and group using the r= switch. The full filter is entered as: r=/(?=.FULL SET USER1)(?=.Grp= 1)/ms