$ ps auxww | grep sexpac
$ ps auxww | grep idl
If either of these calls returns a process ID, do NOT run the following
commands. To start the Pacman programs, open a terminal and type:
$ cd /rotse/data/pipeline/
The output of sexpacman is logged to a file sexpac.log. The output of idlpacman is logged to a file called idlpac.log. The outputs can be monitored with the tail-f command as described in Section 2.3.1.