Database

Disk partitioning, filesystems, LVM, RAID, mount management, and storage monitoring on Linux

Linux file permissions, ownership, special bits, ACLs, and file attribute management

Log management with journalctl, rsyslog, logrotate, and centralized logging strategies on Linux

Linux networking tools including ss, ip, iptables, nftables, and diagnostic utilities

Process lifecycle, monitoring, signals, cgroups, and performance analysis on Linux systems

Bash scripting patterns, control flow, text processing, and automation for Linux administration

Systemd service units, timers, targets, and dependency management for Linux init systems

User and group management, sudo configuration, PAM, and SSH access control on Linux