Warning
Use a sudo-capable account, keep shell history for audit, and back up critical paths before changing boot, SSH, or package state.
What you will achieve
Post-install steps every Linux admin should run before calling the system production-ready.
1) Update package index and installed packages
sudo apt update
sudo apt full-upgrade -y2) Harden accounts and SSH baseline
- Create named sudo user if still using initial account only.
- Disable direct root SSH login where SSH is enabled.
3) Enable firewall and backups
Enable UFW and set a recurring backup job for user and config data.