Ubuntu su authentication Solution

Ubuntu su authentication Solution

After Ubuntu is installed, the root user is locked by default and cannot log on or "Su" to the root user. So how can I use the su command and sudo command?

The following is the setting method:

Jibo @ Linux: $ sudopasswd

Password: <--- enter the password of the user during installation

Enter New unixpassword: <--- New Root User Password

Retype new unixpassword: <--- repeat the New Root User Password

Passwd: the password is successfully updated.

This requires that not only Su, but also sudo.