This micro-course presents the basic Linux commands intended for the administrator. The commands are: arch, uname, domainname, hostname, id, logname, uptine, finger, whoami, who. Thera are many more that will certainly, in the future, help you a lot. With the knowledge of these commands, the administrator will be able to obtain information about the state of the system, modify the host name, identify the users, get information about accounts and logins of the user.