developer-roadmap/roadmaps/linux/content/authentication-logs@WwybfdKuP9ogCGpT7d3NU.md

Authentication Logs

Authentication logs in Linux record all auth-related events like logins, password changes, and sudo commands. Located at /var/log/auth.log (Debian) or /var/log/secure (RHEL/CentOS), these logs help detect brute force attacks and unauthorized access attempts. Use tail /var/log/auth.log to view recent entries. Regular log analysis is essential for server security monitoring.

Visit the following resources to learn more:

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