When you log into the cluster, the SGE environment would have already been set up for you. The SGE commands should have been automatically added into your $PATH.
[sysadm1@frontend-0 sysadm1]$ echo $SGE_ROOT /opt/gridengine [sysadm1@frontend-0 sysadm1]$ which qsub /opt/gridengine/bin/glinux/qsub |