Linux user groups and Rights management

Multi-task multi-users

Per User:

User ID, Password:

Authentication (authentication mechanism):

Authorization (Authorization mechanism):

Account/audition (Audit):

Group: User groups, user containers

User Category:

Management

Normal User

System users

Logged in user

User id: Userio, UID

16bits binary Number: 0-65535

Admin: 0

Normal Users: 1-65635

System User 1-499 (CENTOS6) 1-1000 (CentOS7)

Login user 500-60000 (CentOS6) 1000-60000 (CentOS7)

Name resolution: The process of name translation

Username <--> UID

Based on the name resolution library;

　　　　　　　　　　　　　　　　

Linux user groups and Rights management