The ps command shows the process status. The pg command limits output to a single page at a time, so information does not quickly scroll off the screen. Suspicious processes include system or user processes that use up excessive amounts of a system resource such as CPU or disk space.
System processes such as sendmail , routed , and lpd frequently become runaways.
Use the ps u command to check CPU usage. Determine if you need to stop, suspend, or change the priority of a user process. If you terminate or change the priority of a user process, contact the process owner and explain what you have done. Stop the process using the kill command. Use the ps command to determine the PID number of commands.