Find All Running Processes of a Program
Find the pids of all instances/processes of a given program running on your system
Open a terminal and enter the following –
ps ax | grep "firefox"...replacing 'firefox' with the name of the program you are looking for.
The columns in the output are as follows: (1) pid 'process id' (2) tty (3) process state - see man ps (4) process runtime (5) process command.