lmon

One line per second tells you whether your machine is okay. Color instead of digits: green means calm, red means look.

По-русски · English

macOSLinuxWindows 10+single ~1 MB binaryMIT
lmon --hybrid --cpu
A live rendering of actual lmon --hybrid output: digits on the state-colored background, with the header ribbon pinned to the bottom.green — fine yellow — attentionred — bad

How it looks

Three display modes — plus a compact corner widget. Values are real, captured by lmon on macOS.

lmon: numbers colored by state
lmon — numbers
lmon -b: colored blocks without numbers
lmon -b — color only
lmon --hybrid: numbers on colored background
lmon --hybrid — numbers on color
compact lmon window sized to the indicators
window shrunk to the indicators — tucked into a corner

What it shows

A dot · means the machine has no such sensor (honest, no made-up numbers), 999 — the host is not answering. Any column set and order: lmon --cols NRMC. There is also the colored-squares mode -b and digits on a colored background --hybrid (as in the demo above).

Install

curl -fsSL https://github.com/martiyanov/lmon/releases/latest/download/lmon_darwin_arm64.tar.gz | tar -xz
sudo mv lmon /usr/local/bin/

Intel Mac: use lmon_darwin_amd64.tar.gz. The sudo password is invisible while typing — that is normal.

curl -fsSLO https://github.com/martiyanov/lmon/releases/latest/download/lmon_amd64.deb && sudo dpkg -i lmon_amd64.deb

Fedora/RHEL: pick the .rpm from the releases page; other distros — the tar.gz like on macOS.

curl.exe -fsSL -o lmon.zip https://github.com/martiyanov/lmon/releases/latest/download/lmon_windows_amd64.zip
Expand-Archive lmon.zip; Move-Item lmon\lmon.exe "$env:LOCALAPPDATA\Microsoft\WindowsApps" -Force

SmartScreen will warn about an unknown program: "More info" → "Run anyway".

brew install martiyanov/tap/lmon
go install github.com/martiyanov/lmon@latest

Check it: lmon 5 prints five lines and exits. Built-in reference: lmon help (English by default, lmon help ru for Russian).

Code and releases: github.com/martiyanov/lmon · principles: легко, мало ресурсов, честно · beginner-friendly install in Russian: README.ru