Set the root password after ubuntu is installed on a virtual machine

After ubuntu is installed on a virtual machine, the root password setting problem is described: If ubuntu is installed on a virtual machine, you need to enter the user name. Generally, you will enter your own network name or nickname, the password is also set. Www.2cto.com, but after the installation is successful, run the command # su root, enter the password you just set, and find that the password is incorrect. At the beginning, I set the password once. How can this problem be solved, originally, for the sake of security in ubuntu, during the installation process, the system shields users from setting root users. As a result, many users do not know what the root password is. Then, the solution is as follows. 1. Unlock the root account first and set the Password for the root user to open the terminal. Enter: sudo passwd password: <--- Enter your current User Password Enter new UNIX password: <--- new Root User password Retype new UNIX password: <--- repeat the new Root User password passwd: the password has been successfully updated. 2. Change the logon password, allow root login to open the system> System Management> logon window) Click the "Security" option page and select "Allow local administrator login ". 3. log out of the current user and log in as root.