journalctl

journalctl check for logs that process produce

Get real-time logs

journalctl -f

Get specific process logs

sudo journalctl -u jellyfin -f

Limit time ranges using since and until

journalctl -S "2025-06-01 12:00:00" -U "1 hour ago"

• also possible to use 1 hour ago, yesterday
  View log from a specific user

journalctl _UID=1000

Clear logs after certain size or time

sudo journalctl --vacuum-time 2d
sudo journalctl --vacuum-size 500M

Check log size

sudo journalctl --disk-usage