CentOS user and user group management, centos User Group

CentOS user and user group management, centos User Group

Groupadd maid creates a group according to the system's default gid. The same as the root uid, gid also starts from 1000.

Groupadd-g 1008 create a user group with gid = 1008: maid

Groupdel maid Delete Group

Groupdel cannot delete the user master group of user1

Useradd [-u UID] [-g UID] [-d HOME] [-M] [-s]

-U indicates the custom UID

-G indicates the name of the new user group, which can be followed by the group id or group name.

-D. Customize the user's home directory

-M indicates that the home directory is not created.

-S indicates the custom shell

Useradd test10 adds user test10.

If useradd directly follows the user name without any options, a group with the same name is created.

Userdel user12 delete user user12 and keep the home directory

Userdel-r user12: delete user12 together with the home directory.

Passed gys: Set the user's gys password.

Su switches to the root user, and the current directory remains unchanged.

Su-switch to the root user and change the directory to/root