nandi.uk / monitor
Terminal system monitor in Gleam — htop × btop
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monitor#

A terminal system monitor written in Gleam — sits between htop and btop.

From htop From btop
Dense process table (PID, USER, PRI, NI, VIRT, RES, S, CPU%, MEM%, TIME+, Command) Color meters & sparklines for CPU / memory / swap
Sort by column, filter (/), kill (k) Per-core CPU bars
Keyboard-first navigation Clean alternate-screen TUI

Requirements#

  • Linux (/proc)
  • Gleam + Erlang/OTP
  • A modern terminal (truecolor optional, 256-color fine)

Run#

# if Erlang isn't on PATH (NixOS):
nix develop   # or: nix-shell -p gleam beamPackages.erlang
gleam run

Keys#

Key Action
↑ / u · ↓ / j Move selection (htop-style: k is kill, not up)
PgUp / PgDn Page
g / G Top / bottom
c m p t n Sort by CPU / MEM / PID / TIME / name (press again to reverse)
r Reverse sort
/ Filter (substring on command, user, pid)
k / K Kill selected process (SIGTERM, confirms)
Space Force refresh
h / ? Help
q / Esc Quit

Architecture#

src/
  monitor.gleam   entrypoint
  app.gleam       event loop, keys, refresh
  ui.gleam        layout & rendering (etch)
  sys.gleam       /proc collectors
  format.gleam    bars, sizes, sparklines

Built with etch for the TUI backend.