Shulou(Shulou.com)06/01 Report--

This article shows you how to manage and configure users and groups of the centOS 7 system. The content is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Type of user in 1.Linux

Super Admin root, default ID is 0; Super Admin root can only have one ID0 by default

All accounts created by ordinary users except administrators are ordinary users; default ID500~60000

Program users manage the application usage of the Linux system; default ID1~499

two。 Type of group

Basic groups and additional groups; a group is a collection of users

3. Type of user associated profile

4. Add common options for account useradd

-d specifies the user hosting directory, which is in / home by default

-e specify the time when the account expires

-g specifies the group number or name of the basic group

-G specifies the group number or name of the additional group

-m does not establish a host directory

-s specifies login shell

5. User sets password

The function of the passwd command to set the password

-d clear the password

-l lock the account

-s to check the account lock status

6. Modify common options for users to configure usermod

-l modify the user name

-U unlock the user

-L Lock the account

-d modify the host directory

-e set account expiration time

-g set basic group

-G sets additional groups

-s modify the login shell of the user

II. Configuration file of the group

1. Common options for creating a group groupadd

-g specify the GID or the name of the group

Modify common properties of a group

-an add account

-M add multiple accounts

-d delete a user in a group

III. The attribution of the document directory

1. Access permission

1) read

R stands for or the number 4

Allow viewing of file contents

Allow data in the directory to be listed

2) write-* access permission

W stands for or the number 2

Allow the contents of the file to be modified

Allow creation of subdirectory subfiles to delete data

3) Executive permission

X means to use the number 1

Allow the program to run

Allow switching between directories

two。 Vested ownership

Owner: the permissions that the user has

Group: the permissions that a group has on a file or directory

Other users 0: network account access belongs to other users

3.chmod sets permissions, attributes of chmod

-R sets permissions for directory recursion

The above content is how to manage and configure users and groups in centOS 7 system. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.