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Developer(s) Hisham Muhammad
Initial release May 2004; 14 years ago (2004-05)[1]
Stable release
2.2.0 / April 10, 2018; 4 months ago (2018-04-10)[2]
Repository Edit this at Wikidata
Written in C
Operating system Linux, macOS, FreeBSD, OpenBSD
Type Process Viewer / System monitor
License GNU 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.

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 support was added in htop 2.0.[5]


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