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# [![htop](htop.png)](https://htop.dev)
# [![htop logo](htop.png)](https://htop.dev)
[![CI](https://github.com/htop-dev/htop/workflows/CI/badge.svg)](https://github.com/htop-dev/htop/actions)
[![Coverity Scan Build Status](https://scan.coverity.com/projects/21665/badge.svg)](https://scan.coverity.com/projects/21665)
[![Mailing List](https://img.shields.io/badge/Mailing%20List-htop-blue.svg)](https://groups.io/g/htop)
[![IRC #htop](https://img.shields.io/badge/IRC-htop-blue.svg)](https://web.libera.chat/#htop)
[![Github Release](https://img.shields.io/github/release/htop-dev/htop.svg)](https://github.com/htop-dev/htop/releases/latest)
[![GitHub Release](https://img.shields.io/github/release/htop-dev/htop.svg)](https://github.com/htop-dev/htop/releases/latest)
[![Packaging status](https://repology.org/badge/tiny-repos/htop.svg)](https://repology.org/project/htop/versions)
[![License: GPL v2](https://img.shields.io/badge/License-GPL%20v2-blue.svg)](COPYING?raw=true)
![Screenshot of htop](docs/images/screenshot.png?raw=true)
@ -13,23 +15,27 @@
`htop` is a cross-platform interactive process viewer.
`htop` allows scrolling the list of processes vertically and horizontally to see their full command lines and related information like memory and CPU consumption.
Also system wide information, like load average or swap usage, is shown.
The information displayed is configurable through a graphical setup and can be sorted and filtered interactively.
Tasks related to processes (e.g. killing and renicing) can be done without entering their PIDs.
Running `htop` requires `ncurses` libraries (typically named libncursesw*).
Running `htop` requires `ncurses` libraries, typically named libncurses(w).
For more information and details on how to contribute to `htop` visit [htop.dev](https://htop.dev).
`htop` is written in C.
For more information and details visit [htop.dev](https://htop.dev).
## Build instructions
### Prerequisite
List of build-time dependencies:
* `build-essential` standard GNU autotools-based
* `autoconf`
* `autotools`
* `ncurses`
* standard GNU autotools-based C toolchain
- C99 compliant compiler
- `autoconf`
- `autotools`
* `ncurses`
**Note about `ncurses`:**
> htop requires ncurses 6.0. Be aware the appropriate package is sometimes still called libncurses5 (on Debian/Ubuntu). Also ncurses usually comes in two flavours:
@ -42,27 +48,26 @@ List of additional build-time dependencies (based on feature flags):
* `sensors`
* `hwloc`
* `libcap`
* `libnl-3`
Compiling `htop` requires the header files for `ncurses` . Install these and other required packages for C development from your package manager.
Install these and other required packages for C development from your package manager.
**Debian/Ubuntu**
~~~ shell
sudo apt install libncursesw5-dev autotools-dev autoconf
sudo apt install libncursesw5-dev autotools-dev autoconf build-essential
~~~
**Fedora/RHEL**
~~~ shell
sudo dnf install ncurses-devel automake autoconf
sudo dnf install ncurses-devel automake autoconf gcc
~~~
### Compiling from source:
To compile from sources downloaded from the Git repository (`git clone` or downloads from [Github releases](https://github.com/htop-dev/htop/releases/)), then run:
### Compile from source:
To compile from source, download from the Git repository (`git clone` or downloads from [GitHub releases](https://github.com/htop-dev/htop/releases/)), then run:
~~~ shell
./autogen.sh && ./configure && make
~~~
By default `make install` will install into `/usr/local`, for changing the path use `./configure --prefix=/some/path`.
### Install
To install on the local system run `make install`. By default `make install` installs into `/usr/local`. To change this path use `./configure --prefix=/some/path`.
@ -74,52 +79,55 @@ To install on the local system run `make install`. By default `make install` ins
* `--enable-unicode`:
enable Unicode support
dependency: *libncursesw*
default: *yes*
* `--enable-pcp`:
enable Performance Co-Pilot support via a new pcp-htop utility
dependency: *libpcp*
default: *no*
- dependency: *libncursesw*
- default: *yes*
* `--enable-affinity`:
enable `sched_setaffinity(2)` and `sched_getaffinity(2)` for affinity support; conflicts with hwloc
default: *check*
- default: *check*
* `--enable-hwloc`:
enable hwloc support for CPU affinity; disables affinity support
dependency: *libhwloc*
default: *no*
- dependency: *libhwloc*
- default: *no*
* `--enable-static`:
build a static htop binary; hwloc and delay accounting are not supported
default: *no*
- default: *no*
* `--enable-debug`:
Enable asserts and internal sanity checks; implies a performance penalty
default: *no*
- default: *no*
#### Performance Co-Pilot
* `--enable-pcp`:
enable Performance Co-Pilot support via a new pcp-htop utility
- dependency: *libpcp*
- default: *no*
#### Linux
* `--enable-sensors`:
enable libsensors(3) support for reading temperature data
dependencies: *libsensors-dev*(build-time), at runtime *libsensors* is loaded via `dlopen(3)` if available
default: *check*
- dependencies: *libsensors-dev*(build-time), at runtime *libsensors* is loaded via `dlopen(3)` if available
- default: *check*
* `--enable-capabilities`:
enable Linux capabilities support
dependency: *libcap*
default: *check*
- dependency: *libcap*
- default: *check*
* `--with-proc`:
location of a Linux-compatible proc filesystem
default: */proc*
- default: */proc*
* `--enable-openvz`:
enable OpenVZ support
default: *no*
- default: *no*
* `--enable-vserver`:
enable VServer support
default: *no*
- default: *no*
* `--enable-ancient-vserver`:
enable ancient VServer support (implies `--enable-vserver`)
default: *no*
- default: *no*
* `--enable-delayacct`:
enable Linux delay accounting support
dependencies: *pkg-config*(build-time), *libnl-3* and *libnl-genl-3*
default: *check*
- dependencies: *pkg-config*(build-time), *libnl-3* and *libnl-genl-3*
- default: *check*
## Runtime dependencies:
@ -128,20 +136,22 @@ To install on the local system run `make install`. By default `make install` ins
### Runtime optional dependencies:
`htop` has a set of fixed optional dependencies, depending on build/configure option used:
* `libdl`, if not building static and support for some of the optional libraries is enabled, is always required when support for to optionally load dependencies (i.e. `libsensors`, `systemd`) is present.
#### Linux
* `libdl`, if not building a static binary, is always required when support for to optionally dependencies (i.e. `libsensors`, `libsystemd`) is present.
* `libcap`, user-space interfaces to the POSIX 1003.1e, is always required when `--enable-capabilities` was used to configure `htop`.
* `libsensors`, readout of temperatures and CPU speeds, is optional even when `--enable-sensors` was used to configure `htop`.
* `systemd` is optional when `--enable-static` was not used to configure `htop` (Linux only). If building statically and `libsystemd` is not found by `configure` support for the SystemD meter is disabled entirely.
* `libsystemd` is optional when `--enable-static` was not used to configure `htop`. If building statically and `libsystemd` is not found by `configure`, support for the systemd meter is disabled entirely.
`htop` checks for the availability of the actual runtime lib as `htop` runs.
**BSD**
On most *BSD systems you also have `kvm` as a static requirement to read all the kernel information.
#### BSD
On most BSD systems `kvm` is a requirement to read kernel information.
More information on required and optional dependencies can be found in [configure.ac](configure.ac).
## Usage
See the manual page (`man htop`) or the on-line help ('F1' or 'h' inside `htop`) for a list of supported key commands.
See the manual page (`man htop`) or the help menu (**F1** or **h** inside `htop`) for a list of supported key commands.
## Support
@ -151,14 +161,14 @@ If you have trouble running `htop` please consult your Operating System / Linux
We have a [development mailing list](https://htop.dev/mailinglist.html). Feel free to subscribe for release announcements or asking questions on the development of htop.
You can also join our IRC channel #htop on Libera.Chat and talk to the developers there.
You can also join our IRC channel [#htop on Libera.Chat](https://web.libera.chat/#htop) and talk to the developers there.
If you have found an issue with the source of htop, please check whether this has already been reported in our [Github issue tracker](https://github.com/htop-dev/htop/issues).
If not, please file a new issue describing the problem you have found, the location in the source code you are referring to and a possible fix.
If you have found an issue within the source of htop, please check whether this has already been reported in our [GitHub issue tracker](https://github.com/htop-dev/htop/issues).
If not, please file a new issue describing the problem you have found, the potential location in the source code you are referring to and a possible fix if available.
## History
`htop` was invented, developed and maintained by Hisham Muhammad from 2004 to 2019. His [legacy repository](https://github.com/hishamhm/htop/) has been archived to preserve the history.
`htop` was invented, developed and maintained by [Hisham Muhammad](https://hisham.hm/) from 2004 to 2019. His [legacy repository](https://github.com/hishamhm/htop/) has been archived to preserve the history.
In 2020 a [team](https://github.com/orgs/htop-dev/people) took over the development amicably and continues to maintain `htop` collaboratively.