Getting Started
Linux Server Administration: First-Day Checklist
A practical checklist for updating, securing, monitoring, and documenting a newly deployed Linux server.
Last Updated: 2026-08-20
By AIHOSTON Engineers
The Habit of Proactive Maintenance
Start by applying operating-system updates, creating a named administrative user, configuring SSH keys, restricting SSH access, enabling a firewall with only required ports, and setting the correct timezone. Record the applications and configuration changes you make. Establish independent backups and test restoration before storing important data.
The Ultimate Troubleshooting Toolkit
Use tools such as `htop` for process investigation, `iotop` for disk activity, `df` for storage capacity, `journalctl` for system logs, and `ss` for listening network services. Run packet capture tools only when needed and protect captures because they may contain sensitive traffic metadata.
bash
htop iotop -o tcpdump -i any 'port 80'
