Linux Operations Learning Notes-Role Knowledge Summary

role through UID and the GID differentiate

Root: Super administrator, with all permissions, UID (0).

Ordinary users: Have all permissions to operate their own home directory, other files and directories (/etc,/var) only Read permissions, UID (500-65535).

Virtual User: Puppet, UID (1-499), mainly used to meet the needs of the start-up service.

Command: SU switches the user. sudo power command, the role has not changed, but can improve the use of the command, you need to configure sudo authorization. Parameter-Indicates that the appropriate environment variable is loaded.

System role-related files:
/ETC/PASSWD Profile for user

/etc/shadow User's password file

/etc/group Profiles for user groups

Password file for the/etc/gshadow user group

Linux Operations Learning Notes-Role Knowledge Summary