Install libregexp-common-net-cidr-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libregexp-common-net-cidr-perl
Description:
provide patterns for CIDR blocks
This module provides regexp patterns for CIDR netblocks.
Homepage: http://search.cpan.org/dist/Regexp-Common-net-CIDR/
Version: 0.02-1
Section: universe/perl