This is the home of the UCSB/FNAL/UCSD collaboration for exploiting the physics of CMS.
The repository at the core of this twiki is backed up regularly, every few hours.
Whatever you leave here should thus have a decent chance of not getting lost.
To write on here, you'll need to register at:
http://hepuser.ucsd.edu/twiki/bin/view/TWiki/TWikiRegistration
This is not an automatic process. I.e. there's a human (Rami Vanguri)
who will deliberately allow you in order to avoid our twiki being used
by random folks.
My suggestion is to at the very least upload any presentations to the
meeting agenda page for each meeting.
Other than that, use it as you see fit.
To get access to the uaf at the UCSD tier-2 center. There's also a whole lot of user documentation, including where to find cmssw installation(s). All of this is linked in at the UCSDTier2 webhome on this twiki.