kyle@k427-linux:~$ sudo apt-get update
Ign cdrom://Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016) gutsy/main Translation-en_US
Ign cdrom://Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016) gutsy/restricted Translation-en_US
Reading package lists... Done
kyle@k427-linux:~$ sudo apt-get install irssi
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Couldn't find package irssi
kyle@k427-linux:~$