How do i display service related logs using systemd journalctl?
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-u, --unit=UNIT|PATTERN Show messages for the specified systemd unit UNIT (such as a service unit), or for any of the units matched by PATTERN. If a pattern is specified, a list of unit names found in the journal is compared with the specified pattern and all that match are used. For each unit name, a match is added for messages from the unit ("_SYSTEMD_UNIT=UNIT"), along with additional matches for messages from systemd and messages about coredumps for the specified unit. This parameter can be specified multiple times.
$ journalctl -u training.service -- Logs begin at Thu 2019-01-31 19:40:25 GMT, end at Sat 2019-02-02 22:10:23 GMT Feb 02 15:00:13 centos-linux.shared systemd[1]: Started /bin/vmstat 2. Feb 02 15:00:13 centos-linux.shared vmstat[6491]: procs -----------memory------- Feb 02 15:00:13 centos-linux.shared vmstat[6491]: r b swpd free buff cac Feb 02 15:00:13 centos-linux.shared vmstat[6491]: 2 0 1792 257688 0 8266 Feb 02 15:00:15 centos-linux.shared vmstat[6491]: 0 0 1792 257820 0 8266 ... ... ...
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