Fedora 20 / Fedora 21: 忘記 Root 密碼 + 重設 root 密碼

First, Press 'e' enter grub2 to edit ...

Assume ORIGINAL:
代碼:



   linux        /boot/vmlinuz-3.16.3-200.fc20.x86_64 root=UUID=50d20d3d-f\
e1a-4555-8f6a-d12038f35534 ro console=tty0 console=ttyS0,115200

Change "ro" to "rw init=/bin/bash"
代碼:



   linux        /boot/vmlinuz-3.16.3-200.fc20.x86_64 root=UUID=50d20d3d-f\
e1a-4555-8f6a-d12038f35534 rw init=/bin/bash console=tty0 console=ttyS0,115200

Then,
代碼:


(a) passwd root
(b) touch /.autorelabel
(c) /sbin/reboot -f

代碼:



*** Warning -- SELinux targeted policy relabel is required.
*** Relabeling could take a very long time, depending on file
*** system size and speed of hard drives.

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