ipv4calc -V (return code: 255)
Use of uninitialized value $error[2] in join or string at /usr/share/perl/5.26/Carp.pm line 492.
Net::IPv4Addr: invalid IPv4 address:
at /usr/bin/ipv4calc line 25.
ipv4calc (return code: 255)
usage: ipv4calc [--network | --broadcast | --netmask |
--cidr | --address ] addr