systemctl --failed

systemctl --failed
0 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

systemctl --failed
  UNIT              LOAD   ACTIVE SUB    DESCRIPTION
● apache2.service   loaded failed failed The Apache HTTP Server
● [email protected] loaded failed failed Postfix Mail Transport Agent (instance -) 

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

2 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

systemctl --failed
 UNIT                  LOAD   ACTIVE SUB    DESCRIPTION
● apache2.service       loaded failed failed The Apache HTTP Server
● certbot.service       loaded failed failed Certbot
● [email protected]     loaded failed failed Postfix Mail Transport Agent (instance -)
● snapd.failure.service loaded failed failed Failure handling of the snapd snap
● snapd.service         loaded failed failed Snap Daemon
● snapd.socket          loaded failed failed Socket activation for snappy daemon

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

6 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

Related commands

• systemctl status
• systemctl enable
• systemctl start

See also

• Systemd services: systemctl [status | is-active | start | daemon-reload | stop | mask | reload | restart | reboot | enable | disable | cat], systemctl list-units, systemctl list-timers, systemctl --failed, systemctl get-default, systemctl --help, .service, .timer, .socket, systemctl restart elasticsearch.service, systemctl status apt-daily, systemctl status oscapd, set-property