Hostname

Harden Linux system services by restricting systemd units to remove any Inter-Process Communication (IPC) objects are a service is stopped.

Harden Linux system services by restricting systemd units to change the hostname or NIS domain name of the system with the unit setting ProtectHostname.

OpenSSH performs a host authenticity check when connecting to a system. Learn how to disable the check with the SSH option StrictHostKeyChecking.

Learn how to find the Linux distribution and version of a system. Use the right tool or file to find the relevant details.

Small things have a big impact. Resolving issues with localhost or system hostname. Here is how to check your /etc/hosts file.