[Linux] Linux systems (user management)

There are three types of users in Linux

Root User: Super Administrator

System User: Linux required to run some programs is not recommended to modify

General users: general modification of this

Using the command Groupadd, add user groups, parameters: Group name

In the file/etc/group, add a record

Using the command Groupdel, delete the group, parameter: group name

Using the command Groupmod, modify the group ID, parameter:-G new Group ID group name;

Manage users

Using the command useradd, add user, parameter: User name

For example: Useradd test, a group test:x:502 is generated in the/etc/group file:

A user is generated in the/etc/passwd file Test:x:502:502::/home/test:/bin/bash

A password is generated in the/etc/shadow file test:!! : 16931:0:99999:7:::

Use command passwd, set password, parameter: username

Using the command Userdel, delete user, parameter:-R (delete home directory) user name; home directory in/home/user name

Use Test2 's account to not enter test's home directory

[Linux] Linux systems (user management)