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Developer(s)Htop Developers
Initial releaseMay 2004; 16 years ago (2004-05)[1]
Stable release
3.0.1 / September 3, 2020; 52 days 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

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.

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 also[edit]


  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 links[edit]