How to Use journalctl to Read Linux System Logs
Troubleshoot Linux servers with journalctl — the systemd journal log viewer.
Step 1: View Service Logs
Run journalctl -u nginx to see logs for a specific service.
Step 1: View Service Logs
Step 2: Filter by Time and Priority
Use --since "1 hour ago" and -p err to filter errors from the last hour.
Step 2: Filter by Time and Priority
Step 3: Follow Live Logs
Run journalctl -f -u servicename to tail logs in real time.
Step 3: Follow Live Logs
journalctl -b -1 # previous boot logs
journalctl --disk-usage
Terminal screenshots are original illustrations created for Gnome IT Solutions (blog.gnomeitsolutions.com).