Linux Basics

A compact checklist for everyday Linux work.

Useful habits

• Keep system packages updated.
• Review active services before changing server behavior.
• Keep configuration files small and readable.
• Record important changes in plain text notes.
• Test commands on a narrow scope before applying them broadly.

Common references

• systemctl status for service state.
• journalctl -u service-name for recent logs.
• ss -tulpn for listening ports.
• df -h and du -sh for disk usage.