Linux Create delete users and user groups

1, Useradd-- Create user

Simple to create a normal user (of course, you have to do it under root login)

useradd username - p password

tail

When you create a new user, you alsounder etc directoryof thepasswd fileTo add information about this new user in thewhen we create a successful user, vim /etc/passwd can see the user you just created at the bottom , or you canUsetail-3 etc/passwd command to display only the last 3 lines of the file.

3, Userdel-- Delete the user

Userdel username

4, create a normal user to a senior administrator

First look at the meaning of the user fields in passwd, such as root:

Root:x:0:0:root:/root:/bin/bash

In the middle with ":" Split, the corresponding meaning is:

User name: Password: uid:gid: Description: Home directory: Login using Shell.

In the/etc/passwd file we can take a look at root uid and gid what is it? We can see r , then we can Strong style= "Background-color:inherit;" , then you have root privileges.

6. su--Switching users

If there are multiple users, the SU command is available under the command-line window to switch to each other:
su User name
Description: SU is an abbreviation for switch user, which indicates a switchover.
enter "Exit" from the new user state to return to the user status you just made.

7. Add and delete user groups:

Groupadd testgroup -- Adding a user group

Groupdel testgroup --Deletion of user groups

8, VIM,tail-- View the new user group created

the Add and delete information for the group will be the group file for the ETC directory embodied in it. Use vim /etc/group and tail-3 /etc/group to view

9, Rm-rf testuser -- Delete the directory where the user testuser

After the user is created, the user's home directory is generated at//and the user's home directory can be deleted using rm-rf testuser If you want to delete the user.

This article is from the "Chi Mas" blog, please be sure to keep this source http://gpool.blog.51cto.com/1137393/1602661

Linux Create delete users and user groups