Linux by Rebrain: Пользователи в Linux

The lesson begins at 00:00, then at 01:47 the instructor outlines the topics, at 04:44 the classification of operating systems, at 07:14 the 'whoami' command, at 07:54 the system's user identification, at 11:50 the UID, at 20:15 the /etc/passwd, /etc/group, /etc/shadow files, at 30:45 the password storage, at 1:10:58 the Linux by Rebrain program, and at 1:15:23 the Q&A.