Controlling Processes

• A User may only control processes running on behalf of this User...
• ...Except when the User is "root" - which can control any process running on the system...
• ...Assuming this process is not stuck in a very "stuck" state.
• In order kill a process with a given pid (=process ID):
  
  kill <pid>
• In order kill a "stubborn" process (when a normal kill fails to kill it):
  
  kill -9 <pid>
• In order to temporarily suspend a given process:
  
  kill -STOP <pid>
• In order to resume a suspended process:
  
  kill -CONT <pid>

Originally written by guy keren