Linux user and group command example analysis [switching, adding users, permission control, etc.]

This article describes the Linux user and group commands with examples. Share with you for your reference, the details are as follows:

1. User-related commands

su switch user
root -> Normal user No password required
Password required between ordinary users
Normal user->root requires a password

newgrp Switch group identity

whoami View the current login name
id View user information
groups View user group information
chfn Set user notes
finger View user notes

2. Add users in batches

Create many accounts in Linux, put the information into a text file, and then import it into the system.

1) Edit user files

2) Edit the password file

3) newusers

4) pwunconv writes the password in /etc/shadow back to the /etc/passwd file

5)chpasswd writes the password file we wrote to /etc/passwd

6)pwconv writes the password in /etc/passwd back to shadow

3. Grant special permissions to ordinary users

sudo command

For example: sudo /sbin/shutdown -h 10

/etc/sudoers
This file records which users can execute which commands

visudo

This command is used to manage the /etc/sudoers file

*Find the full path of a command with the whereis command

I hope this article will help you maintain your Linux system.