systemd-analyze

Analyze and debug system manager. Show timing details about the boot process of units (services, mount points, devices, sockets). More information: https://www.freedesktop.org/software/systemd/man/systemd-analyze.html.

• List all running units, ordered by the time they took to initialize:
  systemd-analyze blame
• Print a tree of the time-critical chain of units:
  systemd-analyze critical-chain
• Create an SVG file showing when each system service started, highlighting the time that they spent on initialization:
  systemd-analyze plot > {{path/to/file.svg}}
• Plot a dependency graph and convert it to an SVG file:
  systemd-analyze dot | dot -T{{svg}} > {{path/to/file.svg}}
• Show security scores of running units:
  systemd-analyze security