
Since Linux™ is a true multi-user system, the principles of both users and groups are important to the internal operation of the system, and also to the day-to-day use of the system. The way Linux™ handles users and groups makes it one of the most secure operating systems.
Existen dous tipos diferentes de usuarios:
Physical Users are people who use the system physically. They have user IDs which are usually unique, as well as group IDs.
Os usuarios lóxicos non están ligados a unha persoa, senón a unha función do sistema empregada por aplicativos para realizar tarefas específicas. Os daemons, o correo e as novas son exemplos de usuarios lóxicos.