The iPhone Dev-Team has released a Command Line Interface (CLI) which is an alternative to Absinthe 2.0 untethered iOS 5.1.1 jailbreak.
As per the tweet of MuscleNerd-
CLI version of “rocky-racoon” JB from @pod2g http://is.gd/TAVZ8a . Win/Mac “cinject -Y payloads_rocky” (best on fresh 5.1.1) ?#HITB2012AMS
iPhone-Dev Team had also provided CLI tool as an alternative to the previous Absinthe for the iOS 5.0.1 untethered jailbreak.
CLI tool is for those Jailbreakers who are much advanced as it is based on Command line interface.CLI tool will work better with a fresh install of iOS 5.1.1 as per MuscleNerd.
It is better to stick with the Absinthe 2.0 Jailbreak.
Download CLI Tool for Rocky Racoon 5.1.1 Untether