From Wikipedia, the free encyclopedia
Original author(s)Hisham Muhammad
Developer(s)Hisham Muhammad (2004-2019)
htop developer team (2020-present)
Initial releaseMay 2004; 19 years ago (2004-05)[1]
Written inC (ncurses library)
Operating systemLinux, macOS, FreeBSD, OpenBSD, Solaris, Illumos, OpenIndiana
TypeProcess Viewer / System monitor

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.[2] 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,[3] 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.

htop was forked by several developers as htop-dev, and with support from the original author, the homepage was later redirected to a new domain.[7][better source needed]

See also[edit]


  1. ^ "GitHub - htop-dev/htop at 80f344559bba331d6daa2c913005e7eefddcf075". GitHub.
  2. ^ "System Monitoring with htop". Archived from the original on 2018-06-18. Retrieved 2018-02-05.
  3. ^ "Pinfo - A lynx-style info and man reader". Archived from the original on April 2, 2015. Retrieved November 24, 2014.
  4. ^ "htop FAQ". Archived from the original on January 21, 2014. Retrieved 2012-06-15.
  5. ^ "Going cross-platform: how htop was made portable - FOSDEM 2016". YouTube. Archived from the original on 2021-12-21. Retrieved 2016-12-30.
  6. ^ "Htop - an interactive process viewer". Archived from the original on September 27, 2018. Retrieved September 27, 2018.
  7. ^ "". Hisham Muhammad. Retrieved 2020-12-08.

External links[edit]