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In Zurich, ''$CMTPROJECTPATH'' includes a folder under your home directory (''/home/hep/username/cmtuser'').

You will need to checkout a copy of your package under the appropriate project in ''/home/hep/username/cmtuser/'', OR to symlink it from AFS. For example:

  cd /home/hep/username/cmtuser/
  kinit && aklog
  ln -s /afs/cern.ch/user/u/username/cmtuser/Alignment_v10r3 Alignment_v10r3

Now, every time you start a job on the cluster you will need to setup this specific package version. It is easier if you setup Kerberos in a way that it does not require a password every time. You can do so by creating a **keytab** file with **ktutil**:

  ktutil
    ktutil:  addent -password -p username@CERN.CH -k 1 -e rc4-hmac
    Password for username@CERN.CH: [enter your password]
    ktutil:  addent -password -p username@CERN.CH -k 1 -e aes256-cts
    Password for username@CERN.CH: [enter your password]
    ktutil:  wkt username.keytab
    ktutil:  quit

This way, you can load your folders on the AFS file system by just doing:

  kinit -l7d username@CERN.CH -k -t username.keytab

(the ''-l7d'' flag keeps the session active for 7 days.)

Finally, you can create a script that sets up the correct environment before running your job. The following runs on the openSUSE cluster:

  kinit -l7d username@CERN.CH -k -t /home/hep/username/username.keytab
  aklog
  export CMTCONFIG=x86_64-slc6-gcc48-opt
  . /afs/cern.ch/lhcb/software/releases/LBSCRIPTS/prod/InstallArea/scripts/LbLogin.sh
  /afs/cern.ch/lhcb/software/releases/LBSCRIPTS/prod/InstallArea/scripts/SetupProject.sh Alignment v10r3
  # ...run my job...

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