Getting Started with Irssi

Install a prebuilt package:
 $ sudo pkg_add -i irssi
 Ambiguous: choose package for irssi
     0: <None>
     1: irssi-0.8.12p1
     2: irssi-0.8.12p1-socks
 Your choice: 1

Irssi is now installed at /usr/local/bin/irssi.