Let sudo remember the password-Ubuntu manual Configuration

Because many operations need to be done through the command line method and sudo is required, but it is troublesome to enter the password each time. Today, I have no intention to find a post to tell me how to do this: make sudo not allow passwords in passwords.
Before proceeding with the above steps, you must first change the/etc/sudoers file mode so that the document can be written. After the modification, you need to change it back (at this time, you can only use the su command to change the file attributes...); otherwise, you cannot use the sudo command: 1 Su
2 Chmod   0440   / Etc / Sudoers
3 Exit

If you do not enter a password, it will inevitably lead to risks. However, as a desktop computer, it will endure.