4 examples for ps

  #Displays all of the running processes on a machine which contain the word "caseysProcess"
 ps aux | grep caseysProcess
        

  # Show all processes running by a specific user
ps -u username
        

  # display info about a given process
ps -ef | grep my_shitty_script.pl
        

  # get the pids of all processes matching a string (ruby, in this case)
# it also skips the pid of the current grep process
 ps aux | grep ruby | grep -v grep | awk '{ print $2  }' }'