Secure the Linux system and its files.

This article from Linux Format explores the security features of the Linux operating system. Linux is designed with security in mind and has a user privilege model that restricts access to the system, even for administrator-level users. The default filesystem, ext4, assigns permissions to files and folders, further restricting access. The article provides instructions on how to change file and folder permissions using the chmod command and how to grant access through ownership or group assignment. It also discusses disk encryption, file encryption using GnuPG, hardware security, and encrypting volumes using tools like Cryptsetup and VeraCrypt. The document concludes with instructions on creating a PGP key for file encryption using the Passwords and Keys app. [Extracted from the article]