open(IFCONFIG, '-|', (grep { -x "$_/ip" } split /:/, $ENV{PATH}) ? 'ip address' : 'ifconfig -a')
or die "** Cannot run 'ip address' or 'ifconfig -a'\n";
open(IFCONFIG, '-|', (grep { -x "$_/ip" } split /:/, $ENV{PATH}) ? 'ip address' : 'ifconfig -a')
or die "** Cannot run 'ip address' or 'ifconfig -a'\n";