Operations for Linux users and groups

First, group management

Create Group: Groupadd

Delete Group: Groupdel

Modify Group Properties: Groupmod

Options:

-g:gid

-N: Group name

Second, user management

< directives >< Options >< user Names >

Create User: Useradd

Delete User: Userdel

Modify Properties: Usermod

Options:

-u: normal user uid

-D: Home directory

-G: Primary Group name

-G: Secondary group name

-S: Login shell

-L: User name

Third, user password operation

passwd < options >< User name >

Options:

-L: Locked, locked user cannot log in

-U: Unlocked and can be logged in after unlocking

passwd< user name;: Modify User password

-D: Delete password, can log in directly without password

Iv. Viewing user information

id< user name;: View user uid, primary group GID, subordinate group GID.

finger< user name;: View?

More etc/passwd: View the contents of a file.

Operations for Linux users and groups