Linux: Monitor Processes, “htop”

By Xah Lee. Date: . Last updated: .

This page is a tutorial on the Linux process monitoring tool htop. “htop” is a improved tool over the classic top. [see Linux: Monitor Processes: top]

linux htop screenshot 2015-12-26

htop lists ALL threads, not just processs, and provides easier way to let you sort, search, mark, kill, processes.

Install it, by sudo apt-get install htop.

Start it by htop -d 50 for refresh every 5 second. To refresh manually, press 【Ctrl+l】.

Read manual page by man htop or summary by htop --help.

Basic keys:

linux htop help screenshot 2013-02-03
htop help screen. Press h to start help. Press any key to return.



Search Processes

Mark Processes



Color Threads, Hide Threads

htop will show all threads, not just process.

Set htop to color threads. Press S to setup. Use arrow keys to navigate.

linux htop screenshot color thread 2015-12-27
htop with colored threads. Note that the video player vlc is playing a video file, and has many threads, in green.

Usually you don't care about thread. So you can just hide them both.

linux htop screenshot color thread 2015-12-27 threads
Thread status.

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


  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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