Ubuntu is not in the sudoers file

When sudo is used, the system prompts "xxxis not in the sudoers file. this incident will be report ". XXX is your user name. this error indicates that your user name does not have permission to use sudo. We only need to modify the/etc/sudoers file.

The procedure is as follows:

Step 1: Use the Su-command to enter the super Mode

Jibo @ Linux $ su-

Root @ Linux $

Note:

Note that-This is different from Su. When the "Su" command is used, the system only switches to root, but does not pass the root environment variable to the current user, use the "Su-" command to bring the environment variables together, just like root logon.

Step 2: add the write permission to the sudoers file

Root @ Linux $ chmod U + w/etc/sudoers

Step 3: edit the/etc/sudoers file. Find this line: "rootall = (all) All" add "hostname all = (all) All" under the change line (Change hostname to your username), save and exit

Root @ Linux $ gedit/etc/sudoers

In the sudoers fileRoot all = (all) all add

Hostname all = (all) All

Step 4: revoke the write permission of the file.

Root @ Linux $ chmod U-W/etc/sudoers

Switch to the user mode.