Interpolation 

my @hosts = `cat /etc/hosts`;

say "Contents of /etc/hosts:\n@hosts";

Contents of /etc/hosts:
127.0.0.1       localhost
 127.0.1.1      kereru

 # The following lines are desirable for IPv6 capable hosts
 ::1     localhost ip6-localhost ip6-loopback
 ff02::1 ip6-allnodes
 ff02::2 ip6-allrouters