Linux Tutorial: XXX is not in the sudoers file solution

Problem: when using the sudo command, the system prompts "XXX is not in the sudoers file. This incident will bereported. XXX is your user name, that is, your user name does not have permission to use the sudo command.

Solution: just modify the/etc/sudoers file.

1. Enter the superuser mode. That is, enter "Su-". The system will ask you to enter the superuser password and enter the password to enter the superuser mode. (Note: You can also log on directly with the root user );

2. Add the write permission for the file, because the file sudoers can only be read and cannot be written. Enter the command "chmod U + w/etc/sudoers ";

3. Edit the/etc/sudoers file. Enter the command "VI/etc/sudoers", enter "I" to enter the editing mode, and find this line: "root all = (all) All ", add "xxxall = (all) All" under this line (here XXX is your user name), Press ESC, enter ": WQ", save and quit;

4. revoke the write permission of the file and restore the read/write status of the file. Enter the command "chmod U-W/etc/sudoers ".