- We have already discussed some important concepts like permissions, ownership, SELinux and more. Further expanding on those, the basic security concepts in Linux also include Secure Shell configuration (SSH) also plays a vital role by providing a secure channel for remote login and command execution. Moreover, user authentication, which involves confirming the identity of a user attempting to access the system, is another crucial aspect in ensuring the Linux system is safe from unauthorized access. Understanding and properly implementing these security measures are key to maintaining a robust and secure Linux environment.
- On the topic of authentication. In an environment where security is of utmost importance such as in a server, you may restrict login to RSA keys only.
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- AppArmor, which stands for Application Armor, is a Linux Security Module (LSM). It's a mandatory access control framework that restricts programs' capabilities with per-program profiles. These profiles can enforce a variety of access controls, including limiting the network access of a program, restricting the files a program can read, write, or execute, and more. In short, AppArmor allows system administrators to restrict system-wide applications by applying specific security policies to them. This increases the overall security of the system by reducing the potential attack surface of an application.
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