Linux Create user command

Create a user, set a password, modify a user, delete a user:
useradd testuser Create user TestUser
passwd testuser set a password for the created user TestUser
Description: The newly created user will create a user directory under/home TestUser
usermod--help Modify user parameters for this command
userdel testuser Delete user testuser
rm-rf testuser Delete the directory where the user testuser is located

The above commands can only be used by the root account, if you do not know where the command above your system can use the following command to find its path:

Locate Useradd

When a new user is created, the information about the new user is added to the passwd file in the ETC directory.
Note: In order to, here I used the tail-3passwd command, only the last 3 lines of the file (and the information I am concerned about) display



User Switching between command-line windows:
SU User name
Description:su is an abbreviation for switch user, indicating
Enter "exit" from the new user state to return to the user state you just made



Add and remove user groups:
Groupaddtestgroup

Adding a group
Removal of Groupdeltestgroup groups
Note: the addition and deletion information of the group is reflected in the groups file of the etc directory .

Linux Create user command