Ubuntu Logs: Troubleshooting with journalctl and dmesg
Use journalctl and dmesg to investigate Ubuntu server problems, filter logs by time and service, check previous boots, and give your team a clearer handover.
Ubuntu
How to Flush the DNS Cache on Ubuntu—and Verify the Fix
Flush Ubuntu’s DNS cache, identify the resolver your application uses, and verify website, email or API changes before calling a migration complete.
