How do I find a specific process in Linux?

Procedure to find process by name on Linux

1. Open the terminal application.
2. Type the pidof command as follows to find PID for firefox process: pidof firefox.
3. Or use the ps command along with grep command as follows: ps aux | grep -i firefox.
4. To look up or signal processes based on name use:

How do I view a specific process at the top?

Find the pids of the processes you want to monitor and then use the -p option which allows you to provide a list of pids to the top command.