November 3, 2025
Use journalctl, dmesg, auth logs, and audit tools to trace Linux failures across services, boots, and security events.
Diagnose Linux network issues with ip, ping, dig, ethtool, tcpdump, firewall checks, and clear fixes for common failures.
Troubleshoot Linux filesystem errors safely with logs, unmount checks, fsck, lost+found recovery, backup superblocks, and backups.
Troubleshoot Linux CPU, memory, and disk exhaustion with practical commands, safer cleanup steps, and root-cause checks.
Recover Linux boot failures by checking firmware, GRUB, kernel parameters, filesystems, initramfs, logs, and rescue media.