The Tier2 is accessible to all members of the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) in CERN, Geneva, Switzerland. Interactive logins to Caltech Tier2 resources must comply with the Caltech computing policies.

All clusters and servers at Caltech Tier2 Center use site-wide grid user mapping service (LCMAPS) to authenticate a grid user and provide access to intended resources based on user’s VO membership. A user with CMS VO membership is automatically mapped to a predefined userid.

If you wish to get an account at Caltech Tier2, Please contact either your postdoc contact at Caltech or the T2 admins ( and they can create an account for you. Send the following info to them:

  • Your Supervisor at Caltech full name and contact email;
  • your full name and institutional contact email;
  • your CERN lxplus account name. If you are not a CERN user, give the access.caltech or other established institutional account name;
  • an SSH public key; (How to create SSH Key –
  • initial account expiry date, which can be extended upon need (max 4 years from now for Caltech internal, max 1 year for external);
  • an X509 grid certificate distinguished name in the form of: /DC=ch/DC=cern/OU=Organic Units/OU=Users/CN=... from CRAB Prerequisites – Grid certificate or (search for your institute).
  • Brief description of why and what access is needed, e.g. “I need access to condor queues to conduct research for X.” or “I need X TB Storage for CRAB output files”, etc.

Personal websites

You can create a personal web page by making a directory named public_html within your Linux home directory. Within this directory, you should create a file called index.html or index.php to act as your default home page. In addition, you need to make your home directory group and others readable, same as created a public_html directory.
You should be aware that you are responsible for any material or files you store or publish under this directory.