Linux System password Recovery

The most important thing in a Linux system is the root password, as long as you know the root password, you have all the permissions, and even kill yourself.

For normal users, root can directly modify the gas password, usually passwd username

[Email protected]# passwd usernameenter new unix password:retype new UNIX Password:passwd:password updated successfully

Then the root password to forget, nor is there no way, is to find more trouble.

You first have to shut down the machine into the Grub interface, for entering the GRUB interface. Various statements are not easy, may be related to the operating system, commonly used there are two methods (immediately after the power-down SHIFT, if not enter, you can always press the SHIFT key after the boot, both of my methods are not successful, There is also a boot after the F10, the pro-test success, into the Grub page).

After entering. Select advanced options for Ubuntu, enter.

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After the page jump do not hit enter, select Recovery mode. Press E to enter

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Replace the RO recovery nomodeset "with" Quiet splash RW Init=/bin/bash, then press [F10] or [ctrl+x] to restart the system.

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After rebooting, 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. You can also try quit or exit. Thought Reboot,shutdown,poweroff and other orders can, the pro-test does not work.

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After the reboot, you can log in as root.

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Linux System password Recovery