Linux Ubuntu assign users, add sudo permissions, switch login users, modify user information, view user information

1. Assign users

First log in to the root user (if using: $ sudo su), then add

$ sudo adduser jack

Enter a series of user information as prompted, press Enter without using the default value

2. Add sudo permissions to the user just assigned

$ sudo usermod -G sudo jack

3. Switch users: login user jack

$ su jack

4. Modify the user information in 1

$ sudo chfn

Repeat the steps of entering user information in 1

5. View user information (details view the information entered in the previous step)

$ vi /etc/passwd

6. View user login records

$ sudo apt install finger
$ finger jack

 

other:

1. View the user user1 group

$ groups user1

2. View the list of all users in the sudo group

$ cat /etc/group | grep sudo

 

thank:

https://askubuntu.com/questions/360284/how-do-i-change-my-display-name-on-login

http://manpages.ubuntu.com/manpages/trusty/man1/chfn.1.html

https://blog.csdn.net/ezhchai/article/details/79273741

https://blog.csdn.net/longgeaisisi/article/details/78879119

https://blog.csdn.net/qq_38350907/article/details/78878747