Linux

Inspect and control running processes, services, and overall system state.

Check disk usage, mounts, block devices, and filesystems.

Watch memory, CPU, and I/O to find bottlenecks.

Manage users, groups, ownership, and file permissions.

Inspect interfaces, ports, connectivity, and firewall rules.

Find, search, and transform files and text.

Read system logs and the systemd journal.

Install packages and manage systemd services.

Manage physical volumes, volume groups, and logical volumes.

Schedule jobs with cron and systemd timers.