Create or attach screen with irssi

irssi.sh

#!/bin/bash 
# Save script to ~/.irssi.sh
# Creates a screen and starts irssi in it.
# If the screen already exists, it simply attaches it.
# Create an alias in your ~/.bashrc to access it simply.
# alias irc='~/.irssi.sh'

if screen -list | grep -q "irssi"; then                             
  screen -x irssi                                                   
else                                                                
  screen -S irssi irssi                                             
fi  

I use this to ensure a persistent irc presence by simply typing 'irc'.