The best way to ensure that your Linux server is secure is to build it from scratch with a minimum amount of code that can be exploited by a hacker -- a custom compiled kernel and the bare minimum of packages needed for the server to do its intended job.
But what if you already have Linux servers running in your business? If that's the case then here are some simple steps you can take to improve security that take just a few minutes to implement:

Remove unnecessary software to minimize your attack surface - The more code your server is running, the more likely it is that a hacker will be able to find a vulnerability to exploit. Go through all the packages installed on your system and remove any that aren't necessary.

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