btop/README.md
aristocratos bd5d697830 Squashed commit of the following:
commit c296ac13cd
Merge: 9a1e760 091c30a
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Sat Aug 26 19:29:57 2023 +0200

    Merge pull request #590 from nobounce/dangling-reference-config

    Convert parameters and config keys to std::string_view

commit 9a1e760a66
Merge: 9c8af4d 22e64ca
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Sat Aug 26 19:20:18 2023 +0200

    Merge pull request #602 from jfouquart/main

    Fix getting zfs pool name with '.' char in freebsd

commit 9c8af4df43
Merge: 8a49d8c 2217cbe
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Sat Aug 26 19:18:55 2023 +0200

    Merge pull request #601 from joske/cleanup

    [macos] don't check /sys on macos

commit 8a49d8cf45
Merge: 1556388 008fcd8
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Sat Aug 26 19:18:07 2023 +0200

    Merge pull request #600 from joske/makefile

    [macos/freebsd] support gcc13

commit 1556388c83
Merge: 1b126f5 d17e1a2
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Sat Aug 26 19:14:00 2023 +0200

    Merge pull request #599 from joske/main

    [macos] fix temp sensor on system with many cores

commit d17e1a2dac
Author: Jos Dehaes <jos.dehaes@gmail.com>
Date:   Fri Aug 25 16:18:39 2023 +0200

    fix some warnings

commit 4d8aa6b118
Author: Jos Dehaes <jos.dehaes@gmail.com>
Date:   Fri Aug 25 15:52:58 2023 +0200

    fix core check

commit 22e64caaff
Author: Jonathan Fouquart <jfouquart@hotmail.fr>
Date:   Fri Aug 25 09:37:49 2023 +0200

    Fix getting zfs pool name with '.' char in freebsd

commit 2217cbe143
Author: Jos Dehaes <jos.dehaes@gmail.com>
Date:   Wed Aug 23 16:01:04 2023 +0200

    [macos] don't check /sys on macos

commit 008fcd889e
Author: Jos Dehaes <jos.dehaes@gmail.com>
Date:   Wed Aug 23 16:05:00 2023 +0200

    also add g++13

commit 0fdca5eb03
Author: Jos Dehaes <jos.dehaes@gmail.com>
Date:   Wed Aug 23 15:54:07 2023 +0200

    support gcc13

commit dcbdb7360d
Author: Jos Dehaes <jos.dehaes@gmail.com>
Date:   Wed Aug 23 15:46:47 2023 +0200

    [macos] fix temp sensor on system with many cores

commit 1b126f55e3
Author: aristocratos <gnmjpl@gmail.com>
Date:   Fri Aug 4 01:08:27 2023 +0200

    Update Makefile for partial static compilation on freebsd

commit c8ec6bbb00
Author: aristocratos <gnmjpl@gmail.com>
Date:   Thu Aug 3 23:08:33 2023 +0200

    Fix freebsd nullptr changes and makefile for gcc12 and newer

commit 8a33aab588
Merge: 94e5c02 e4abcef
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Sun Jul 30 13:21:48 2023 +0200

    Merge pull request #539 from nobounce/replace-NULL-nullptr

    Modernize using nullptr.

commit 94e5c02d11
Author: aristocratos <gnmjpl@gmail.com>
Date:   Thu Jul 27 20:51:21 2023 +0200

    Better text editing

commit 091c30ab2b
Author: nobounce <steffen.winter@proton.me>
Date:   Thu Jul 27 14:17:54 2023 +0200

    Convert parameters and config keys to std::string_view

    Using std::string_view instead of std::string& silences a new warning
    from GCC 13, -Wdangling-reference

    Also switch return type of `getI` from int& to int, trivial types are
    cheaper to copy by value

commit e4abcefbf9
Author: nobounce <steffen.winter@proton.me>
Date:   Wed Jul 26 16:19:17 2023 +0200

    Use nullptr instead of NULL.

    See https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf
    TLDR: NULL is of type int and relies on proper implicit pointer
    conversion which may lead to issues when using overloaded functions

    It is also considered a 'best practise' for modern C++ and
    conveys the programmers intention more precisly.

commit d53307f14c
Author: nobounce <steffen.winter@proton.me>
Date:   Sun Jul 23 19:53:36 2023 +0200

    Fix path to Linux CI file in itself

    The CI file has a list of dependent files including itself. The path was
    not updated when the CI was split into different files

commit 594f42b9eb
Merge: aca2e4b 53d6eba
Author: Jakob P. Liljenberg <admin@qvantnet.com>
Date:   Wed Jul 26 15:38:01 2023 +0200

    Merge pull request #584 from nobounce/nb/fix-ci-path

    Fix path to Linux CI file in itself

commit aca2e4be75
Author: aristocratos <gnmjpl@gmail.com>
Date:   Wed Jul 26 14:38:48 2023 +0200

    Fix whitespace indent -> tab indent

commit 33faa01910
Author: aristocratos <gnmjpl@gmail.com>
Date:   Wed Jul 26 14:34:15 2023 +0200

    Revert fmt submodule to static fmt folder in include

commit 53d6ebabc0
Author: nobounce <steffen.winter@proton.me>
Date:   Sun Jul 23 19:53:36 2023 +0200

    Fix path to Linux CI file in itself

    The CI file has a list of dependent files including itself. The path was
    not updated when the CI was split into different files
2023-08-26 20:29:43 +02:00

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Markdown

# ![btop++](Img/logo.png)
<a href="https://repology.org/project/btop/versions">
<img src="https://repology.org/badge/vertical-allrepos/btop.svg" alt="Packaging status" align="right">
</a>
![Linux](https://img.shields.io/badge/-Linux-grey?logo=linux)
![macOS](https://img.shields.io/badge/-OSX-black?logo=apple)
![FreeBSD](https://img.shields.io/badge/-FreeBSD-red?logo=freebsd)
![Usage](https://img.shields.io/badge/Usage-System%20resource%20monitor-yellow)
![c++20](https://img.shields.io/badge/cpp-c%2B%2B20-green)
![latest_release](https://img.shields.io/github/v/tag/aristocratos/btop?label=release)
[![Donate](https://img.shields.io/badge/-Donate-yellow?logo=paypal)](https://paypal.me/aristocratos)
[![Sponsor](https://img.shields.io/badge/-Sponsor-red?logo=github)](https://github.com/sponsors/aristocratos)
[![Coffee](https://img.shields.io/badge/-Buy%20me%20a%20Coffee-grey?logo=Ko-fi)](https://ko-fi.com/aristocratos)
[![btop](https://snapcraft.io/btop/badge.svg)](https://snapcraft.io/btop)
[![Continuous Build Linux](https://github.com/aristocratos/btop/actions/workflows/continuous-build-linux.yml/badge.svg)](https://github.com/aristocratos/btop/actions/workflows/continuous-build-linux.yml)
[![Continuous Build macOS](https://github.com/aristocratos/btop/actions/workflows/continuous-build-macos.yml/badge.svg)](https://github.com/aristocratos/btop/actions/workflows/continuous-build-macos.yml)
[![Continuous Build FreeBSD](https://github.com/aristocratos/btop/actions/workflows/continuous-build-freebsd.yml/badge.svg)](https://github.com/aristocratos/btop/actions/workflows/continuous-build-freebsd.yml)
## Index
* [News](#news)
* [Documents](#documents)
* [Description](#description)
* [Features](#features)
* [Themes](#themes)
* [Support and funding](#support-and-funding)
* [Prerequisites](#prerequisites) (Read this if you are having issues!)
* [Screenshots](#screenshots)
* [Keybindings](#help-menu)
* [Installation Linux/macOS](#installation)
* [Compilation Linux](#compilation-linux)
* [Compilation macOS](#compilation-macos-osx)
* [Compilation FreeBSD](#compilation-freebsd)
* [GPU compatibility](#gpu-compatibility)
* [Installing the snap](#installing-the-snap)
* [Configurability](#configurability)
* [License](#license)
## News
##### 28 August 2022
[![btop4win](https://github.com/aristocratos/btop4win/raw/master/Img/logo.png)](https://github.com/aristocratos/btop4win)
First release of btop4win available at https://github.com/aristocratos/btop4win
##### 16 January 2022
Release v1.2.0 with FreeBSD support. No release binaries for FreeBSD provided as of yet.
Again a big thanks to [@joske](https://github.com/joske) for his porting efforts!
Since compatibility with Linux, macOS and FreeBSD are done, the focus going forward will be on new features like GPU monitoring.
##### 13 November 2021
Release v1.1.0 with macOS support. Binaries in [continuous-build-macos](https://github.com/aristocratos/btop/actions/workflows/continuous-build-macos.yml) are only x86 for now.
macOS binaries + installer are included for both x86 and ARM64 (Apple Silicon) in the releases.
Big thank you to [@joske](https://github.com/joske) who wrote the vast majority of the implementation!
<details>
<summary>More...</summary>
##### 30 October 2021
Work on the OSX [macOS] and FreeBSD branches, both initiated and mostly worked on by [@joske](https://github.com/joske), will likely be completed in the coming weeks.
The OSX [macOS] branch has some memory leaks that needs to be sorted out and both have some issues with the processes cpu usage calculation and other smaller issues that needs fixing.
If you want to help out, test for bugs/fix bugs or just try out the branches:
**macOS / OSX**
```bash
# Install and use Homebrew or MacPorts package managers for easy dependency installation
brew install coreutils make gcc@11
git clone https://github.com/aristocratos/btop.git
cd btop
git checkout OSX
gmake
```
**FreeBSD**
```bash
sudo pkg install gmake gcc11 coreutils git
git clone https://github.com/aristocratos/btop.git
cd btop
git checkout freebsd
gmake
```
Note that GNU make (`gmake`) is recommended but not required for macOS/OSX but it is required on FreeBSD.
##### 6 October 2021
macOS development have been started by [@joske](https://github.com/joske), big thanks :)
See branch [OSX](https://github.com/aristocratos/btop/tree/OSX) for current progress.
##### 18 September 2021
The Linux version of btop++ is complete. Released as version 1.0.0
I will be providing statically compiled binaries for a range of architectures in every release for those having problems compiling.
For compilation GCC 10 is required, GCC 11 preferred.
Please report any bugs to the [Issues](https://github.com/aristocratos/btop/issues/new?assignees=aristocratos&labels=bug&template=bug_report.md&title=%5BBUG%5D) page.
The development plan right now:
* 1.1.0 macOS [OSX] support
* 1.2.0 FreeBSD support
* 1.3.0 Support for GPU monitoring
* 1.X.0 Other platforms and features...
Windows support is not in the plans as of now, but if anyone else wants to take it on, I will try to help.
##### 5 May 2021
This project is gonna take some time until it has complete feature parity with bpytop, since all system information gathering will have to be written from scratch without any external libraries.
And will need some help in the form of code contributions to get complete support for BSD and macOS/OSX.
</details>
## Documents
**[CHANGELOG.md](CHANGELOG.md)**
**[CONTRIBUTING.md](CONTRIBUTING.md)**
**[CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md)**
## Description
Resource monitor that shows usage and stats for processor, memory, disks, network and processes.
C++ version and continuation of [bashtop](https://github.com/aristocratos/bashtop) and [bpytop](https://github.com/aristocratos/bpytop).
## Features
* Easy to use, with a game inspired menu system.
* Full mouse support, all buttons with a highlighted key is clickable and mouse scroll works in process list and menu boxes.
* Fast and responsive UI with UP, DOWN keys process selection.
* Function for showing detailed stats for selected process.
* Ability to filter processes.
* Easy switching between sorting options.
* Tree view of processes.
* Send any signal to selected process.
* UI menu for changing all config file options.
* Auto scaling graph for network usage.
* Shows IO activity and speeds for disks.
* Battery meter
* Selectable symbols for the graphs.
* Custom presets
* And more...
## Themes
Btop++ uses the same theme files as bpytop and bashtop (some color values missing in bashtop themes) .
See [themes](https://github.com/aristocratos/btop/tree/main/themes) folder for available themes.
The `make install` command places the default themes in `[$PREFIX or /usr/local]/share/btop/themes`.
User created themes should be placed in `$XDG_CONFIG_HOME/btop/themes` or `$HOME/.config/btop/themes`.
Let me know if you want to contribute with new themes.
## Support and funding
You can sponsor this project through github, see [my sponsors page](https://github.com/sponsors/aristocratos) for options.
Or donate through [paypal](https://paypal.me/aristocratos) or [ko-fi](https://ko-fi.com/aristocratos).
Any support is greatly appreciated!
## Prerequisites
For best experience, a terminal with support for:
* 24-bit truecolor ([See list of terminals with truecolor support](https://github.com//termstandard/colors))
* 256-color terminals are supported through 24-bit to 256-color conversion when setting "truecolor" to False in the options or with "-lc/--low-color" arguments.
* 16 color TTY mode will be activated if a real tty device is detected. Can be forced with "-t/--tty_on" arguments.
* Wide characters (Are sometimes problematic in web-based terminals)
Also needs a UTF8 locale and a font that covers:
* Unicode Block “Braille Patterns” U+2800 - U+28FF (Not needed in TTY mode or with graphs set to type: block or tty.)
* Unicode Block “Geometric Shapes” U+25A0 - U+25FF
* Unicode Block "Box Drawing" and "Block Elements" U+2500 - U+259F
### **Notice (Text rendering issues)**
* If you are having problems with the characters in the graphs not looking like they do in the screenshots, it's likely a problem with your systems configured fallback font not having support for braille characters.
* See [Terminess Powerline](https://github.com/ryanoasis/nerd-fonts/tree/master/patched-fonts/Terminus/terminus-ttf-4.40.1) for an example of a font that includes the braille symbols.
* See comments by @sgleizes [link](https://github.com/aristocratos/bpytop/issues/100#issuecomment-684036827) and @XenHat [link](https://github.com/aristocratos/bpytop/issues/100#issuecomment-691585587) in issue #100 for possible solutions.
* If text are misaligned and you are using Konsole or Yakuake, turning off "Bi-Directional text rendering" is a possible fix.
* Characters clipping in to each other or text/border misalignments is not bugs caused by btop, but most likely a fontconfig or terminal problem where the braille characters making up the graphs aren't rendered correctly.
* Look to the creators of the terminal emulator you use to fix these issues if the previous mentioned fixes don't work for you.
## Screenshots
#### Main UI showing details for a selected process
![Screenshot 1](Img/normal.png)
#### Main UI in TTY mode
![Screenshot 2](Img/tty.png)
#### Main UI with custom options
![Screenshot 3](Img/alt.png)
#### Main-menu
![Screenshot 3](Img/main-menu.png)
#### Options-menu
![Screenshot 4](Img/options-menu.png)
#### Help-menu
![Screenshot 5](Img/help-menu.png)
## Installation
**Binaries for Linux are statically compiled with musl and works on kernel 2.6.39 and newer**
1. **Download btop-(VERSION)-(ARCH)-(PLATFORM).tbz from [latest release](https://github.com/aristocratos/btop/releases/latest) and unpack to a new folder**
**Notice! Use x86_64 for 64-bit x86 systems, i486 and i686 are 32-bit!**
2. **Install (from created folder)**
* **Run install.sh or:**
```bash
# use "make install PREFIX=/target/dir" to set target, default: /usr/local
# only use "sudo" when installing to a NON user owned directory
sudo make install
```
3. **(Optional) Set suid bit to make btop always run as root (or other user)**
Enables signal sending to any process without starting with `sudo` and can prevent /proc read permissions problems on some systems.
* **Run setuid.sh or:**
```bash
# run after make install and use same PREFIX if any was used at install
# set SU_USER and SU_GROUP to select user and group, default is root:root
sudo make setuid
```
* **Uninstall**
* **Run uninstall.sh or:**
```bash
sudo make uninstall
```
* **Show help**
```bash
make help
```
**Binary release (from native os repo)**
* **openSUSE**
* **Tumbleweed:**
```bash
sudo zypper in btop
```
* For all other versions, see [openSUSE Software: btop](https://software.opensuse.org/package/btop)
* **Fedora**
```bash
sudo dnf install btop
```
* **RHEL/AlmaLinux 8+**
```bash
sudo dnf install epel-release
sudo dnf install btop
```
* **FreeBSD**
```sh
pkg install btop
```
**Binary release on Homebrew (macOS (x86_64 & ARM64) / Linux (x86_64))**
* **[Homebrew](https://formulae.brew.sh/formula/btop)**
```bash
brew install btop
```
## Compilation Linux
Needs GCC 10 or higher, (GCC 11 or above strongly recommended for better CPU efficiency in the compiled binary).
The makefile also needs GNU coreutils and `sed` (should already be installed on any modern distribution).
For a `cmake` based build alternative see the [fork](https://github.com/jan-guenter/btop/tree/main) by @jan-guenter
1. **Install dependencies (example for Ubuntu 21.04 Hirsute)**
Use gcc-10 g++-10 if gcc-11 isn't available
```bash
sudo apt install coreutils sed git build-essential gcc-11 g++-11
```
2. **Clone repository**
```bash
git clone https://github.com/aristocratos/btop.git
cd btop
```
3. **Compile**
Append `VERBOSE=true` to display full compiler/linker commands.
Append `STATIC=true` for static compilation.
Notice! If using LDAP Authentication, usernames will show as UID number for LDAP users if compiling statically with glibc.
Append `QUIET=true` for less verbose output.
Append `STRIP=true` to force stripping of debug symbols (adds `-s` linker flag).
Append `ARCH=<architecture>` to manually set the target architecture.
If omitted the makefile uses the machine triple (output of `-dumpmachine` compiler parameter) to detect the target system.
Append `RSMI_STATIC=true` to statically link the ROCm SMI library used for querying AMDGPU data.
See [GPU compatibility](#gpu-compatibility) for details.
Use `ADDFLAGS` variable for appending flags to both compiler and linker.
For example: `ADDFLAGS=-march=native` might give a performance boost if compiling only for your own system.
If `g++` is linked to an older version of gcc on your system specify the correct version by appending `CXX=g++-10` or `CXX=g++-11`.
```bash
make
```
4. **Install**
Append `PREFIX=/target/dir` to set target, default: `/usr/local`
Notice! Only use "sudo" when installing to a NON user owned directory.
```bash
sudo make install
```
5. **(Optional) Set suid bit to make btop always run as root (or other user)**
No need for `sudo` to enable signal sending to any process and to prevent /proc read permissions problems on some systems.
Run after make install and use same PREFIX if any was used at install.
Set `SU_USER` and `SU_GROUP` to select user and group, default is `root` and `root`
```bash
sudo make setuid
```
* **Uninstall**
```bash
sudo make uninstall
```
* **Remove any object files from source dir**
```bash
make clean
```
* **Remove all object files, binaries and created directories in source dir**
```bash
make distclean
```
* **Show help**
```bash
make help
```
## Compilation macOS OSX
Needs GCC 10 or higher, (GCC 11 or above strongly recommended for better CPU efficiency in the compiled binary).
GCC 12 needed for macOS Ventura. If you get linker errors on Ventura you'll need to upgrade your command line tools (Version 14.0) is bugged.
The makefile also needs GNU coreutils and `sed`.
Install and use Homebrew or MacPorts package managers for easy dependency installation
1. **Install dependencies (example for Homebrew)**
```bash
brew install coreutils make gcc@12
```
2. **Clone repository**
```bash
git clone https://github.com/aristocratos/btop.git
cd btop
```
3. **Compile**
Append `VERBOSE=true` to display full compiler/linker commands.
Append `STATIC=true` for static compilation (only libgcc and libstdc++ will be static!).
Append `QUIET=true` for less verbose output.
Append `STRIP=true` to force stripping of debug symbols (adds `-s` linker flag).
Append `ARCH=<architecture>` to manually set the target architecture.
If omitted the makefile uses the machine triple (output of `-dumpmachine` compiler parameter) to detect the target system.
Use `ADDFLAGS` variable for appending flags to both compiler and linker.
For example: `ADDFLAGS=-march=native` might give a performance boost if compiling only for your own system.
```bash
gmake
```
4. **Install**
Append `PREFIX=/target/dir` to set target, default: `/usr/local`
Notice! Only use "sudo" when installing to a NON user owned directory.
```bash
sudo gmake install
```
5. **(Recommended) Set suid bit to make btop always run as root (or other user)**
No need for `sudo` to see information for non user owned processes and to enable signal sending to any process.
Run after make install and use same PREFIX if any was used at install.
Set `SU_USER` and `SU_GROUP` to select user and group, default is `root` and `wheel`
```bash
sudo gmake setuid
```
* **Uninstall**
```bash
sudo gmake uninstall
```
* **Remove any object files from source dir**
```bash
gmake clean
```
* **Remove all object files, binaries and created directories in source dir**
```bash
gmake distclean
```
* **Show help**
```bash
gmake help
```
## Compilation FreeBSD
Needs GCC 10 or higher, (GCC 11 or above strongly recommended for better CPU efficiency in the compiled binary).
Note that GNU make (`gmake`) is required to compile on FreeBSD.
1. **Install dependencies**
```bash
sudo pkg install gmake gcc11 coreutils git
```
2. **Clone repository**
```bash
git clone https://github.com/aristocratos/btop.git
cd btop
```
3. **Compile**
Append `VERBOSE=true` to display full compiler/linker commands.
Append `STATIC=true` for static compilation (only libgcc and libstdc++ will be static!).
Append `QUIET=true` for less verbose output.
Append `STRIP=true` to force stripping of debug symbols (adds `-s` linker flag).
Append `ARCH=<architecture>` to manually set the target architecture.
If omitted the makefile uses the machine triple (output of `-dumpmachine` compiler parameter) to detect the target system.
Use `ADDFLAGS` variable for appending flags to both compiler and linker.
For example: `ADDFLAGS=-march=native` might give a performance boost if compiling only for your own system.
```bash
gmake
```
4. **Install**
Append `PREFIX=/target/dir` to set target, default: `/usr/local`
Notice! Only use "sudo" when installing to a NON user owned directory.
```bash
sudo gmake install
```
5. **(Recommended) Set suid bit to make btop always run as root (or other user)**
No need for `sudo` to see information for non user owned processes and to enable signal sending to any process.
Run after make install and use same PREFIX if any was used at install.
Set `SU_USER` and `SU_GROUP` to select user and group, default is `root` and `wheel`
```bash
sudo gmake setuid
```
* **Uninstall**
```bash
sudo gmake uninstall
```
* **Remove any object files from source dir**
```bash
gmake clean
```
* **Remove all object files, binaries and created directories in source dir**
```bash
gmake distclean
```
* **Show help**
```bash
gmake help
```
## GPU compatibility
Btop++ supports NVIDIA and AMD GPUs out of the box on Linux, provided you have the correct drivers and libraries.
Compatibility with Intel GPUs using generic DRM calls is planned, as is compatibility for FreeBSD and macOS.
* **NVIDIA**
You must use an official NVIDIA driver, both the closed-source and [open-source](https://github.com/NVIDIA/open-gpu-kernel-modules) ones have been verified to work.
In addition to that you must also have the `nvidia-ml` dynamic library installed, which should be included with the driver package of your distribution.
* **AMD**
AMDGPU data is queried using the [ROCm SMI](https://github.com/RadeonOpenCompute/rocm_smi_lib) library, which may or may not be packaged for your distribution. If your distribution doesn't provide a package, btop++ is statically linked to ROCm SMI with the `RSMI_STATIC=true` make flag.
This flag expects the ROCm SMI source code in `lib/rocm_smi_lib`, and compilation will fail if it's not there. The latest tested version is 5.6.x, which can be obtained with the following command:
```bash
git clone https://github.com/RadeonOpenCompute/rocm_smi_lib.git --depth 1 -b rocm-5.6.x lib/rocm_smi_lib
```
## Installing the snap
[![btop](https://snapcraft.io/btop/badge.svg)](https://snapcraft.io/btop)
### Note: there are now two snaps available: `btop` and `btop-desktop`. The desktop version is much larger and includes the desktop entries needed to allow for launching `btop` with a click.
* **Install the snap**
```bash
sudo snap install btop
or
sudo snap install btop-desktop
```
* **Install the latest snap from the edge channel**
```
sudo snap install btop --edge
or
sudo snap install btop-desktop --edge
```
* **Connect the interface**
```bash
sudo snap connect btop:removable-media
or
sudo snap connect btop-desktop:removable-media
```
## Configurability
All options changeable from within UI.
Config and log files stored in `$XDG_CONFIG_HOME/btop` or `$HOME/.config/btop` folder
#### btop.conf: (auto generated if not found)
```bash
#? Config file for btop v. 1.2.2
#* Name of a btop++/bpytop/bashtop formatted ".theme" file, "Default" and "TTY" for builtin themes.
#* Themes should be placed in "../share/btop/themes" relative to binary or "$HOME/.config/btop/themes"
color_theme = "Default"
#* If the theme set background should be shown, set to False if you want terminal background transparency.
theme_background = True
#* Sets if 24-bit truecolor should be used, will convert 24-bit colors to 256 color (6x6x6 color cube) if false.
truecolor = True
#* Set to true to force tty mode regardless if a real tty has been detected or not.
#* Will force 16-color mode and TTY theme, set all graph symbols to "tty" and swap out other non tty friendly symbols.
force_tty = False
#* Define presets for the layout of the boxes. Preset 0 is always all boxes shown with default settings. Max 9 presets.
#* Format: "box_name:P:G,box_name:P:G" P=(0 or 1) for alternate positions, G=graph symbol to use for box.
#* Use whitespace " " as separator between different presets.
#* Example: "cpu:0:default,mem:0:tty,proc:1:default cpu:0:braille,proc:0:tty"
presets = "cpu:1:default,proc:0:default cpu:0:default,mem:0:default,net:0:default cpu:0:block,net:0:tty"
#* Set to True to enable "h,j,k,l,g,G" keys for directional control in lists.
#* Conflicting keys for h:"help" and k:"kill" is accessible while holding shift.
vim_keys = False
#* Rounded corners on boxes, is ignored if TTY mode is ON.
rounded_corners = True
#* Default symbols to use for graph creation, "braille", "block" or "tty".
#* "braille" offers the highest resolution but might not be included in all fonts.
#* "block" has half the resolution of braille but uses more common characters.
#* "tty" uses only 3 different symbols but will work with most fonts and should work in a real TTY.
#* Note that "tty" only has half the horizontal resolution of the other two, so will show a shorter historical view.
graph_symbol = "braille"
# Graph symbol to use for graphs in cpu box, "default", "braille", "block" or "tty".
graph_symbol_cpu = "default"
# Graph symbol to use for graphs in cpu box, "default", "braille", "block" or "tty".
graph_symbol_mem = "default"
# Graph symbol to use for graphs in cpu box, "default", "braille", "block" or "tty".
graph_symbol_net = "default"
# Graph symbol to use for graphs in cpu box, "default", "braille", "block" or "tty".
graph_symbol_proc = "default"
#* Manually set which boxes to show. Available values are "cpu mem net proc" and "gpu0" through "gpu5", separate values with whitespace.
shown_boxes = "proc cpu mem net"
#* Update time in milliseconds, recommended 2000 ms or above for better sample times for graphs.
update_ms = 1500
#* Processes sorting, "pid" "program" "arguments" "threads" "user" "memory" "cpu lazy" "cpu responsive",
#* "cpu lazy" sorts top process over time (easier to follow), "cpu responsive" updates top process directly.
proc_sorting = "cpu lazy"
#* Reverse sorting order, True or False.
proc_reversed = False
#* Show processes as a tree.
proc_tree = False
#* Use the cpu graph colors in the process list.
proc_colors = True
#* Use a darkening gradient in the process list.
proc_gradient = True
#* If process cpu usage should be of the core it's running on or usage of the total available cpu power.
proc_per_core = True
#* Show process memory as bytes instead of percent.
proc_mem_bytes = True
#* Use /proc/[pid]/smaps for memory information in the process info box (very slow but more accurate)
proc_info_smaps = False
#* Show proc box on left side of screen instead of right.
proc_left = False
#* Sets the CPU stat shown in upper half of the CPU graph, "total" is always available.
#* Select from a list of detected attributes from the options menu.
cpu_graph_upper = "total"
#* Sets the CPU stat shown in lower half of the CPU graph, "total" is always available.
#* Select from a list of detected attributes from the options menu.
cpu_graph_lower = "total"
#* Toggles if the lower CPU graph should be inverted.
cpu_invert_lower = True
#* Set to True to completely disable the lower CPU graph.
cpu_single_graph = False
#* Show cpu box at bottom of screen instead of top.
cpu_bottom = False
#* Shows the system uptime in the CPU box.
show_uptime = True
#* Show cpu temperature.
check_temp = True
#* Which sensor to use for cpu temperature, use options menu to select from list of available sensors.
cpu_sensor = "Auto"
#* Show temperatures for cpu cores also if check_temp is True and sensors has been found.
show_coretemp = True
#* Set a custom mapping between core and coretemp, can be needed on certain cpus to get correct temperature for correct core.
#* Use lm-sensors or similar to see which cores are reporting temperatures on your machine.
#* Format "x:y" x=core with wrong temp, y=core with correct temp, use space as separator between multiple entries.
#* Example: "4:0 5:1 6:3"
cpu_core_map = ""
#* Which temperature scale to use, available values: "celsius", "fahrenheit", "kelvin" and "rankine".
temp_scale = "celsius"
#* Use base 10 for bits/bytes sizes, KB = 1000 instead of KiB = 1024.
base_10_sizes = False
#* Show CPU frequency.
show_cpu_freq = True
#* Draw a clock at top of screen, formatting according to strftime, empty string to disable.
#* Special formatting: /host = hostname | /user = username | /uptime = system uptime
clock_format = "%H:%M"
#* Update main ui in background when menus are showing, set this to false if the menus is flickering too much for comfort.
background_update = True
#* Custom cpu model name, empty string to disable.
custom_cpu_name = ""
#* Optional filter for shown disks, should be full path of a mountpoint, separate multiple values with whitespace " ".
#* Begin line with "exclude=" to change to exclude filter, otherwise defaults to "most include" filter. Example: disks_filter="exclude=/boot /home/user".
disks_filter = "exclude=/boot"
#* Show graphs instead of meters for memory values.
mem_graphs = True
#* Show mem box below net box instead of above.
mem_below_net = False
#* Count ZFS ARC in cached and available memory.
zfs_arc_cached = True
#* If swap memory should be shown in memory box.
show_swap = True
#* Show swap as a disk, ignores show_swap value above, inserts itself after first disk.
swap_disk = True
#* If mem box should be split to also show disks info.
show_disks = True
#* Filter out non physical disks. Set this to False to include network disks, RAM disks and similar.
only_physical = True
#* Read disks list from /etc/fstab. This also disables only_physical.
use_fstab = False
#* Set to true to show available disk space for privileged users.
disk_free_priv = False
#* Toggles if io activity % (disk busy time) should be shown in regular disk usage view.
show_io_stat = True
#* Toggles io mode for disks, showing big graphs for disk read/write speeds.
io_mode = False
#* Set to True to show combined read/write io graphs in io mode.
io_graph_combined = False
#* Set the top speed for the io graphs in MiB/s (100 by default), use format "mountpoint:speed" separate disks with whitespace " ".
#* Example: "/mnt/media:100 /:20 /boot:1".
io_graph_speeds = ""
#* Set fixed values for network graphs in Mebibits. Is only used if net_auto is also set to False.
net_download = 100
net_upload = 100
#* Use network graphs auto rescaling mode, ignores any values set above and rescales down to 10 Kibibytes at the lowest.
net_auto = True
#* Sync the auto scaling for download and upload to whichever currently has the highest scale.
net_sync = False
#* Starts with the Network Interface specified here.
net_iface = "br0"
#* Show battery stats in top right if battery is present.
show_battery = True
#* Which battery to use if multiple are present. "Auto" for auto detection.
selected_battery = "Auto"
#* Set loglevel for "~/.config/btop/btop.log" levels are: "ERROR" "WARNING" "INFO" "DEBUG".
#* The level set includes all lower levels, i.e. "DEBUG" will show all logging info.
log_level = "DEBUG"
```
#### Command line options
```text
usage: btop [-h] [-v] [-/+t] [-p <id>] [--utf-force] [--debug]
optional arguments:
-h, --help show this help message and exit
-v, --version show version info and exit
-lc, --low-color disable truecolor, converts 24-bit colors to 256-color
-t, --tty_on force (ON) tty mode, max 16 colors and tty friendly graph symbols
+t, --tty_off force (OFF) tty mode
-p, --preset <id> start with preset, integer value between 0-9
--utf-force force start even if no UTF-8 locale was detected
--debug start in DEBUG mode: shows microsecond timer for information collect
and screen draw functions and sets loglevel to DEBUG
```
## LICENSE
[Apache License 2.0](LICENSE)