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ClementTsang

ClementTsang/bottom

A customizable cross-platform terminal graphical monitor for processes and system resources on Linux, macOS and Windows.

Open-source alternative to:htop

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Last commit
18 days ago

What is it?

bottom (btm) is a terminal-based system and process monitor written in Rust. It displays graphs over time for CPU usage (average and per core), RAM and swap, network I/O, temperature and disk I/O, along with tables for disk capacity, temperature sensors and battery status.

The process widget lets you sort and search processes, send kill signals, and switch to a tree view that shows parent-child relationships. Graph time intervals can be zoomed, and any single widget can be expanded to fill the screen. An htop-inspired basic mode is also included.

Behaviour is controlled through command-line flags or a config file that is generated on first launch. It includes built-in and custom colour themes, adjustable layouts, and entry filtering. Shell completion files are provided for Bash, Zsh, fish, PowerShell, Elvish, Fig and Nushell.

Key features

  • 01Time-series graphs for CPU, memory, network, temperature and disk I/O with zoom
  • 02Process table with sorting, searching, kill signals and tree mode
  • 03Disk, temperature sensor and battery information widgets
  • 04Built-in and custom colour themes plus configurable layouts
  • 05Official support for Linux, macOS and Windows

Use cases

  • Watching CPU, memory and network load on a server or workstation from an SSH session
  • Finding and terminating runaway processes from the terminal
  • Replacing top or htop with a view that includes graphs and disk and temperature data

Quick start

  1. 1

    Update Rust stable toolchain

    rustup update stable
  2. 2

    Install bottom from crates.io with Cargo

    cargo install bottom --locked

Things to know

  • Some platforms like FreeBSD and Android are only unofficially supported.

Topics

#terminal#system-monitor#process-monitor#rust#tui#cli#cross-platform#bottom#btm#monitoring

FAQ

What is bottom?
A customizable cross-platform terminal graphical monitor for processes and system resources on Linux, macOS and Windows. bottom (btm) is a terminal-based system and process monitor written in Rust. It displays graphs over time for CPU usage (average and per core), RAM and swap, network I/O, temperature and disk I/O, along with tables for disk capacity, temperature sensors and battery status.
Is bottom free to use? What license does it have?
bottom is open source under the MIT license. Check the license terms before using it in commercial products.
Is bottom still maintained?
Actively maintained. The last commit to bottom was on Oct 4, 2026.
What can I use bottom for?
Watching CPU, memory and network load on a server or workstation from an SSH session Finding and terminating runaway processes from the terminal Replacing top or htop with a view that includes graphs and disk and temperature data
How do I install bottom?
Update Rust stable toolchain: rustup update stable Install bottom from crates.io with Cargo: cargo install bottom --locked
Where can I get bottom?
The source code and installation instructions are on GitHub: https://github.com/ClementTsang/bottom

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