SystemD

systemd

systemd-analyze

  • Display process startup time:

systemd-analyze blame

  • Display process startup time at service level:

/etc/systemd/system /usr/lib/systemd/system

  • Unit file locations.

systemctl

systemctl list-units

  • List running units:

systemctl status

  • List system status:

systemctl --failed

  • List failed services

systemctl list-units

  • List all loaded/active units

systemctl list-units --state=running

  • List running units

systemctl status foo

  • Check the status of a service

systemctl {start,stop,restart,reload} foo

  • Control a service

systemctl {enable,disable} foo

  • Change startup on boot

systemctl list-dependencies foo.service

  • List the dependencies of a service
  • when no service name is specified, lists the dependencies of default.target

systemd-analyze blame

  • Show boot chain

journalctl

journalctl -f

  • actively follow log (like tail -f):

journalctl -b -p err

  • display all errors since last boot:

journalctl --since=2012-10-15 --until="2011-10-16 23:59:59"

  • filter by time period:

journalctl -F _SYSTEMD_UNIT

  • show list of systemd units logged in journal:

journalctl -u dbus

  • filter by specific unit:

journalctl /usr/bin/dbus-daemon

  • filter by executable name:

journalctl _PID=123

  • filter by PID:

journalctl _COMM=sshd

  • filter by Command, e.g., sshd:

journalctl _COMM=crond --since '10:00' --until '11:00'

  • filter by Command and time period:

journalctl --list-boots

  • list all available boots:

journalctl _UID=1000

  • filter by specific User ID e.g., user id 1000:

journalctl --disk-usage

  • display the current disk usage of all journal files: