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Linux

journalctl

Safesystemd logs

journalctl -xe

Inspect service/system logs; -u scopes a unit, -f follows.

Examples

  • journalctl -u nginx -n 100Last 100 lines for nginx

Syntax

journalctl -u <svc> | -xe | -f

Before you run it

Read-only.

Used when you see

Service won't start / keeps crashing
2
Chase the cause in logsUse -u and -xe
See the whole flow →
Scheduled job didn't run
2
Check the journal for cron records at that time
See the whole flow →
Logs are eating the disk
1
Check journal usage and vacuum by time/size--disk-usage, then --vacuum-time=14d.
See the whole flow →

Related commands

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