This paper discusses and comments on the basic concepts of security and privacy related to Linux operating systems in personal use. This paper does not include consideration of Linux operating systems in use for servers and other special purposes. The first part describes the basic concepts of the Linux operating system and its most important distributions. In the second part, there is an emphasis on security and privacy in the use of computers in general. The concept of privacy and security, as well as their interrelationship and importance, is discussed. The importance of the CIA pyramid as a basic concept of security and privacy management is emphasized. Typical cases of threats to security and privacy are also listed. The third part deals with some of the most important safe and reliable Internet browsers. Crominum, GoLogin, Brave, Vivaldi and Tor browsers are described in more detail. In the fourth part, the focus is on Linux systems that are specifically designed to be secure. Linux operating systems are covered in more detail: TAILS, Kodachi, Qubes, Parrot. Linux security is compared with Windows and Mac operating systems. The conclusion emphasizes the strength and advantage of Linux in terms of ensuring security and privacy in personal use.