Authentication Logs

Authentication logs record system login events, password changes, and sudo commands, located in /var/log/auth.log (Debian) or /var/log/secure (Red Hat/CentOS). Essential for monitoring server security, detecting brute force attacks and unauthorized access attempts. Use tail /var/log/auth.log to view recent entries. Regular analysis ensures server security and data integrity.

Visit the following resources to learn more:

• @article@Monitoring Linux Authentication Logs
• @article@How to Check Linux Login History - Linux Handbook