A system monitor for Linux, built in Elixir with ex_ratatui.

Catppuccin Macchiato theme · live CPU/GPU/memory charts · process management · BEAM runtime stats

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Features

• Dashboard - CPU cores, memory/swap/disk gauges, GPU usage (NVIDIA, AMD, Intel), and live charts
• Processes - sortable table, name/user/PID filter, send signals (TERM, KILL, STOP, CONT, HUP, INT)
• Network - per-interface throughput and history graph
• System - native host info (OS, kernel, desktop, battery, IPs, …) plus live BEAM/OTP runtime metrics

Requirements

Running a release

• Linux with /proc and /sys (tested on Ubuntu)
• A terminal with true-color support

A compiled release is self-contained — you do not need Elixir or Erlang installed to run it.

Building from source

• Elixir 1.19+ (see mix.exs)
• Erlang/OTP — OTP 29 is recommended. On Elixir 1.20.2, extop starts and exits noticeably faster on OTP 29 than on OTP 28.

Optional: gsettings for GTK theme details on the System tab.

Development

git clone <repo-url>
cd extop
mix deps.get
mix run

Press q or Esc to quit.

Install

Build a standalone release:

MIX_ENV=prod mix release

Run it directly - no start subcommand needed:

./_build/prod/rel/extop/bin/extop

Copy _build/prod/rel/extop anywhere and run bin/extop from that directory.

Add the release bin directory to your PATH to run extop from anywhere:

export PATH="/path/to/extop/_build/prod/rel/extop/bin:$PATH"
extop

For a permanent setup, add that line to ~/.bashrc, ~/.zshrc, or your shell profile.

Release management commands still work when passed explicitly:

./bin/extop stop
./bin/extop remote
./bin/extop version

Keybindings

Key	Action
1–4 / Tab	Switch tabs
q / Esc	Quit
↑ ↓ j	Scroll / select process
/	Filter processes
p u n c m	Sort by PID / user / name / CPU / mem
t k s r h i	Send signal to selected process
r	Refresh System tab info

License

See LICENSE if present.