Linux is open-source and almost all its distributions are also open-sourced. The entire code is available to anyone and can be customized based on the license agreements. You can easily create a modification in the code, submit new and useful updates, share it with others, etc. Iwork with linux like OC and hosting servers for a while. For example good tips for protect linux server https://orbitingweb.com/blog/steps-to-securing-linux-server/ The first step to secure your Linux server is to automatically or regularly update the operating system and all installed software and local repositories