How does Linux Grant super user permissions to common users?

The problem is assumed that the user name is ali. if the user name does not have the superuser permission, when you enter the sudo + command, the system prompts: Code: aliisnotinthesudoersfileThisincidentwillbereported solves the problem of 1 entering the superuser mode: ali if the user name does not have the superuser permission, when you enter the sudo + command, the system prompts :. the code is as follows: ali is not in the sudoers file. this incident will be reported. solution 1. enter the superuser mode. Enter "su". The system will ask you to enter the superuser password and enter the password to enter the superuser mode. 2. add the write permission for the file .. The code is as follows: chmod u + w/etc/sudoers3. edit the/etc/sudoers file. Enter the command "vim/etc/sudoers" and find this line: "root ALL = (ALL) ALL". add "xxx ALL = (ALL) ALL "(here xxx is the user name to be changed), and then save. the code is as follows: ali ALL = (ALL) ALL u here refers to the file owner + w Add write permission u + x refers to only use the current user to have write permission 4. revoke the write permission of a file .. The code is as follows: chmod u-w/etc/sudoers