Solve the is not in the sudoers file problem in Ubuntu, using tusudoers

Solve the is not in the sudoers file problem in Ubuntu, using tusudoers

In Ubuntu12.04, when sudo apt-get install XXX is used, the username is not in the sudoers file problem suddenly exists.

Then I checked the username type, which is a standard user instead of an administrator user.

There are at least two ways to solve this problem:

I. System Settings-> User Accounts-> click Unlock-> enter the root password-> change AccountType to Administrator (Administrator)-> restart

II

Under the root user, change the/etc/sudoers permission to 640 (chmod 640/etc/sudoers)-> vim/etc/sudoers-> Find root ALL = (ALL: ALL) ALL-> Add

Username ALL = (ALL: ALL) ALL-> modify the/etc/sudoers permission to 440 (chmod 440/etc/sudoers)-> restart

There are two methods I know. If there are other methods, please leave a message.