What would you do if you were given control of a server about which you have no information, and you only have access keys and need to document it?

The first step will be to connect to the server using the provided keys and gather basic system information:

• Check the operating system and its version (uname -a, cat /etc/os-release).
• Review installed services and running processes (systemctl list-units --type=service, ps aux).
• Study configuration files of main services (e.g., web server, databases).
• Check network settings and open ports (ip a, ss -tuln).
• Assess user permissions and rights.

Next, you can create a document including:

• Description of hardware and software environment.
• List and purpose of main services.
• Instructions for managing and restarting services.
• Contact details and links to additional resources (if any).

It is important to keep the documentation up to date and, if possible, automate information gathering with scripts for easier updates.