If you ever need to terminate a unix process that is running, type the unix command,

ps  -eaf  |  grep  your_username

in a xterm window.  Locate the PID number in the first column that corresponds to the process and type the command,

kill   -9   PID

in a xterm window, where PID is the process ID number corresponding to the process.  To list just a process or processes from a particular program, i.e., synopsys, the command is,

ps   -eaf   |   grep   your_username   |   grep synopsys

To kill all your processes running on a machine, you can use the command,

kill   -1   -1