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wtf is rainbarf?

backes/rainbarf — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2013-11-15

★ 1PerlAudience · developerComplexity · 1/5DormantSetup · easy

TL;DR

A tiny terminal tool that draws a live, colorful bar chart of your CPU and memory usage right in your tmux status bar.

Mindmap

mindmap
  root((repo))
    What it does
      CPU chart
      Memory chart
      Battery status
      Live updates
    Tech stack
      Perl
      tmux
    Use cases
      Monitor system load
      Watch long processes
      Terminal dashboard
    Audience
      Developers
      Sysadmins
      Terminal power users
    Platforms
      Mac
      Linux
      FreeBSD

Code map

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filefunction / class

Why would anyone build with this?

REASON 1

Add a live CPU/memory graph to your tmux status bar.

REASON 2

Keep an eye on system load while running long processes without switching windows.

REASON 3

Show battery charge and remaining time in the terminal footer on a laptop.

What's in the stack?

Perltmux

How it stacks up

backes/rainbarfdougwilson/perl5-gravatar-urljhthorsen/mojolicious-plugin-validatemoose
Stars111
LanguagePerlPerlPerl
Last pushed2013-11-152011-09-212013-11-24
MaintenanceDormantDormantDormant
Setup difficultyeasyeasymoderate
Complexity1/51/52/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · easy Time to first run · 30min

Requires tmux and Perl, color rendering can vary by terminal.

Yoink these prompts

Prompt 1
Help me install rainbarf and wire it into my tmux status-right config.
Prompt 2
Explain what the different colors in rainbarf's memory bar mean.
Prompt 3
Show me how to adjust rainbarf's RGB color mode and brightness for my terminal.
Prompt 4
Write a tmux.conf snippet that runs rainbarf and refreshes it every few seconds.

Frequently asked questions

wtf is rainbarf?

A tiny terminal tool that draws a live, colorful bar chart of your CPU and memory usage right in your tmux status bar.

What language is rainbarf written in?

Mainly Perl. The stack also includes Perl, tmux.

Is rainbarf actively maintained?

Dormant — no commits in 2+ years (last push 2013-11-15).

How hard is rainbarf to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is rainbarf for?

Mainly developer.

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