htop is an interactive system-monitor process-viewer and process-manager. It is designed as an alternative to the Unix program top. It shows a frequently updated list of the processes running on a computer, normally ordered by the amount of CPU usage. Unlike top, htop provides a full list of processes running, instead of the top resource-consuming processes. htop uses color and gives visual information about processor, swap and memory status. htop can also display the processes as a tree.

Original author(s)Hisham Muhammad
Developer(s)Hisham Muhammad (2004-2019)
htop developer team (2020-present)
Initial releaseMay 2004; 16 years ago (2004-05)[1]
Stable release
3.0.1 / September 3, 2020; 2 months ago (2020-09-03)[2]
Repository Edit this at Wikidata
Written inC (ncurses library)
Operating systemLinux, macOS, FreeBSD, OpenBSD, Solaris, Illumos, OpenIndiana
TypeProcess Viewer / System monitor
LicenseGNU General Public License

Users often deploy htop in cases where Unix top does not provide enough information about the system's processes. htop is also popularly used interactively as a system monitor.[3] Compared to top, it provides a more convenient, visual, cursor-controlled interface for sending signals to processes.

htop is written in the C programming language using the ncurses library. Its name is derived from the original author's first name, as a nod to pinfo, an info-replacement program that does the same.[4]

Because system monitoring interfaces are not standardized among Unix-like operating systems, much of htop's code must be rewritten for each operating system. Cross-platform, OpenBSD, FreeBSD and Mac OS X, support was added in htop 2.0.[5][6] Solaris/Illumos/OpenIndiana support added in 2.2.0.

See alsoEdit


  1. ^ Earliest known date
  2. ^ htop 3.0.1 on GitHub
  3. ^ "System Monitoring with htop". Archived from the original on 2018-06-18. Retrieved 2018-02-05.
  4. ^ "htop FAQ". Retrieved 2012-06-15.
  5. ^ "Going cross-platform: how htop was made portable - FOSDEM 2016". Retrieved 2016-12-30.
  6. ^

External linksEdit