systemd-analyze: what slows the boot and what is wrong in a unit

cheat sheet · Ubuntu 24.04 · systemd 255 https://lab.dimsanych.ru/en/wiki/systemd-analyze/

Cheat sheet

systemd-analyze how long the boot took
systemd-analyze blame | head units by start-up time
systemd-analyze critical-chain chain up to the boot target
systemd-analyze critical-chain nginx.service what a unit waited for
systemd-analyze verify ./app.service check a unit file
systemd-analyze verify app.service check an installed unit
systemd-analyze plot > boot.svg boot chart
systemd-analyze security app service hardening score

Options

Subcommands and options are in the table below; the full list is in systemd-analyze --help and man systemd-analyze. Boot times and verify work as a regular user, without sudo.