UBuntu sudo command: XXX isn't in the sudoers file. This incident would be reported.

"1" Analysis problem

The prompt content translates into Chinese namely: User xxx (generally the newly added user name) does not have permission to use sudo.

Workaround Modify the permissions of the new user by modifying the/etc/sudoers file.

"2" switch to root user mode

Command: Su-

Note: This command has a "-", which is different from Su.

When using the command "su" just switch to root, but not the root environment variable passed, or the current user's environment variables.

Using the "Su-" command will also switch the environment variables in the past (can be tested, two commands to see the environment variable $path), as if the root login.

"3" Modify the Write permission of the file

Command: chmod u+w/etc/sudoers

"4" Edit file contents

Command: Gedit/etc/sudoers

After opening the file, look for root all= (all) all this line

Add a line below this line:

XXX all= (All) all

where xxx is the user name. Remember to save.

"5" revoke write permission for the file

Command: chmod u-w/etc/sudoers

"6" validation issue. Switch to User xxx

Command: Su XXX

Enter the password for the user. The sudo command can be used normally.

Good good study,day day up.

Sequential Selection Cycle Summary

UBuntu sudo command: XXX isn't in the sudoers file. This incident would be reported.