* Reboot into CentOS and try to log in.
At {{Admon/important|SELinux|Depending on how you edited your file: at this point you will may not be able to log in as any user with any password. The root password has been removed but SELinux is "securing" your system and will not allow the login process to read the shadow file, therefore you can't log in. We'll need to fix this.}}
* Reboot your VM and at the boot prompt press <code>e</code> (for Edit).