username is not in the sudoers file. This incident will be reported solved

1.go to  Terminal (Application>Accessoories>Terminal)

• username@debian: ~$ su //
• enter Password //
• output : root@debian:/home/username#

2. Try enter sudo bash

• username@debian:~$ sudo bash //
• Enter Password
• If this pop up "username is not in the sudoers file. This incident will be reported." //
• So you can solve it with //

3. Mayb many way to fix this problem from any source but.. try this *nih //

• username@debian:~$ su //
• enter Password
• on the 'root@debian:/home/username#' enter echo 'username ALL=(ALL) ALL' >> /etc/sudoers

4. after that check back 'sudo bash' //

5. if work. its will become like this.. " root@debian:/home/username# " //

Thanks for my master Mr.DrebarBas