Linux: List Processes: ps

By Xah Lee. Date: . Last updated: .

This page shows you how to use the Linux ps command for listing processes.

ps -e show all processes, but display just the command name.

PID TTY          TIME CMD
    1 ?        00:00:01 init
    2 ?        00:00:00 kthreadd
    3 ?        00:00:04 ksoftirqd/0
    6 ?        00:00:03 migration/0
    7 ?        00:00:00 watchdog/0
…
◆ ps -e | grep emacs
  PID TTY          TIME CMD
 2624 pts/3    00:06:04 emacs
…

ps -ef shows also the parent id PPID, and command argument.

◆ ps -ef
UID        PID  PPID  C STIME TTY          TIME CMD
xah       2624  2535  0 04:00 pts/3    00:06:04 emacs
…

ps -eF shows more info.

◆ ps -eF
UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
xah       2624  2535  0 30853 74104   2 04:00 pts/3    00:06:05 emacs
…
◆ ps -ely
S   UID   PID  PPID  C PRI  NI   RSS    SZ WCHAN  TTY          TIME CMD
R  1000  2624  2535  0  80   0 74360 30853 -      pts/3    00:06:14 emacs
…

here's all of them.

◆ ps -e | grep firefox
 6545 pts/7    00:10:38 firefox

◆ ps -ef | grep firefox
xah       6545  2624  4 15:51 pts/7    00:10:39 /usr/lib/firefox/firefox /home/joe/web/x.html

◆ ps -eF | grep firefox
xah       6545  2624  4 157412 153504 0 15:51 pts/7    00:10:39 /usr/lib/firefox/firefox /home/joe/web/x.html

◆ ps -ely | grep firefox
S  1000  6545  2624  4  80   0 153504 157412 poll_s pts/7  00:10:39 firefox

Linux Shell Basics

  1. Get System Info
  2. Shell Basics
  3. grep, cat, awk, uniq
  4. sort
  5. find, xargs
  6. diff Files/Dir
  7. dir size: du
  8. dir tree
  9. tar gzip bzip2 xz 7zip rar zip
  10. wget, curl, GET, HEAD
  11. rsync
  12. Install Packages

Sys Admin

  1. Job Control
  2. ps
  3. top
  4. htop
  5. RAM stat
  6. Users and Groups
  7. File Permission
  8. Opened Files: lsof
  9. shutdown, sleep

Bash/Terminal

  1. Bash Keys, Terminal Keys, Man Page Keys
  2. Bash Prompt Setup
  3. Bash Color Prompt
  4. .bashrc, .profile, .bash_profile
  5. Virtual Console
  6. Terminal Control Sequence Keys
  7. Reset Terminal
  8. tmux
  9. man page
  10. Bash Manual in Chapters
  11. BASH Shell Misc Tips
  12. Log Terminal Session

Linux Desktop

  1. Most Useful GUI Apps
  2. Set Default App
  3. Shell Commands for GUI Apps
  4. Image Viewers
  5. Music Players
  6. Move File to Trash by Command
  7. X11 Selection and Clipboard
  8. How to Switch to LXDE, Xfce
  9. LXDE Keyboard Shortcuts
  10. LXDE/Openbox, Change Keyboard Shortcuts
  11. LXDE Set Key Repeat Rate
  12. LXDE/OpenBox, Disable Mouse Scroll Wheel Hide Window
  13. Xfce Keyboard Shortcuts
  14. Xfce Good Themes
  15. xmonad Keybinding
  16. How to Restart X11
  17. Why Tiling Window Manager Sucks
  18. Standard Fonts
  19. How to Install Font

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