Ubuntu14.04 Retrieve administrator or root password

Start the system and display the Grub selection menu (if the default system boot process does not show the Grub menu, you need to press and hold the [Shift] key to display the Grub interface when the system starts), select advanced options for Ubuntu, press [Enter] to enter, Select recovery mode and do not press ENTER.

Press [E] key to enter the command editing state, to Linux/boot/vmlinuz-....... ro recovery nomodeset line, the "Ro recovery nomodeset" replaced with "Quiet splash RW init=/ Bin/bash ", press [F10] or [ctrl+x] to restart the system. At this point, start a read-write bash as root, use the command passwd to change the root password, and then press [Ctrl+alt+delete] to restart the system. This is to set the root password, if it is set other user password use command: passwd user name can be

Ubuntu14.04 Retrieve administrator or root password