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For hTop, the homotopy category of topological spaces, see Homotopy category.
Developer(s) Hisham Muhammad
Stable release 1.0.3 / April 24, 2014; 18 months ago (2014-04-24)[1]
Written in C
Operating system Linux
Type Process Viewer / System monitor
License GNU General Public License

htop is an interactive system-monitor process-viewer written for Linux. 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.

Users often deploy htop in cases where Unix top does not provide enough information about the system's processes, for example when trying to find minor memory leaks in applications.[citation needed] Htop is also popularly used interactively as a system monitor.[2] Compared to top, it provides a more convenient, 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.[3]

Although htop is written for Linux, it is possible to run htop on FreeBSD,[4] since that OS can emulate Linux's procfs. Htop is available from FreeBSDs ports collection.[5]


  1. ^ [htop] [ANN] htop 1.0.3
  2. ^ "System Monitoring with htop". 
  3. ^ "htop FAQ". Retrieved 2012-06-15. 
  4. ^ "htop FreeBSD". Retrieved 2011-02-16. 
  5. ^ "htop". 

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