What are the steps when securing a Linux server?

Install and configure a firewall:

Install and configure a firewall to protect the server from external threats.

Harden SSH

Harden the SSH protocol by disabling root login and changing the default port.

Install and configure an intrusion detection system:

Install and configure an intrusion detection system to monitor the server for malicious activities.

Lock down services

Disable services that are not needed and remove any unnecessary accounts.

Perform regular security scans

Perform regular security scans to check for vulnerabilities in the system.

Patch and update

Ensure that the system is up-to-date with the latest security patches and updates.

Monitor logs

Monitor log files for suspicious activity.

Backup regularly

Perform regular backups of the system in case of an emergency.