Linux Commands | Process Management | ps Process List

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ps Command

The ps command prints a list of currently running processes.

Syntax

ps (options)

Options

  • -e: Prints information for all processes.
  • -f: Prints detailed process information.
  • -a: Prints all processes for all users that are running.
  • -u: Prints information about the user who started the process and the process start time.
  • -x: Prints processes that do not have a controlling terminal.

ps Command Examples

Example 1

You can check the PID and PPID.

ps -ef | grep *** (running process):

Example 2

You can check USER, PID, %CPU, %MEM, RSS, TTY, STAT, and START.

ps -aux | grep *** (running process):

Note

  • USER: User who started the process.
  • PID: Process ID.
  • %CPU: Percentage of CPU time used by the process in the last minute.
  • %MEM: Percentage of actual memory used by the process in the last minute.
  • RSS: Actual memory size currently used by the process.
  • TTY: Terminal controlling the process.
  • STAT: Process status code.
  • START: Process start time.