Add Superuser privileges to Linux normal users sudo

Problem:
Assume that the user name is: Ali
If the user name does not have Superuser privileges, when you enter the sudo + command, the system prompts:

Ali is isn't in the sudoers file. This incident would be reported.

Solve:
1. Enter Super User mode. Enter "Su", the system will let you enter the super user password, enter the password and enter the Super User mode.

2. Add Write permission to the file.

chmod u+w/etc/sudoers

3. Edit the/etc/sudoers file. That is, enter the command "Vim/etc/sudoers", find this line: "Root all= (All) all" in the following add "XXX all= (All) all" (Here xxx is to change the user name), and then save

Ali All= (All) all

U here refers to the file owner
+w Adding writable Permissions
U+x means only the current user has writable permissions

4. Revoke the Write permission of the file.

chmod u-w/etc/sudoers

Add Superuser privileges to Linux normal users sudo