Users and groups using simple operation

To enter this command in command mode
useradd (create a user account name)
-d (home directory)
/ Home placed in this directory
r1 (user)

passwd (password)

Set r2 r3 user and password

Check / etc / passwd find this three rows corresponding to the user.

Check / etc / shadow to find this three rows corresponding to the user's
user ID r1 is set to 608, set the time for the October 30, 2018

Create a GID of 701, a group named user group accounts renshi of.

R1 r2 r3 added into the group renshi.

R1 is set for the group administrator

R3 remove a user from the group

Delete User r3