Linux servers are already extremely secure by default that8217s why 100 of supercomputers most of the top 1 million servers and top 25 of websites on the internet run on Linux. Besides having security tools in place users should follow a few steps to further secure Linux servers.
As we all know nothing is perfect. Things can go wrong if proper precautions are not taken. Once in a while Linux tools encounter serious vulnerabilities and due to the nature of these tools open-source all tools quickly receive security fixes. .
When it comes to compromising a Linux server most of the time users8217 actions are responsible for it. After the compromise we get to know the compromise could easily be prevented by implementing a simple firewall rule.
In this article I will mention 10 steps to secure Linux server.
By default Ubuntu and other Linux servers set up a root user upon installation. Once the root user is logged-in it does not need authentication to perform any action on the server. root user is considered insecure to log-in instead the administrator should set up the privileged users under 8216sudo8217 group that requires authentication to make important changes on the server.