Lost root access, edited /etc/hostname

[poulson]

I was tired of a bland hostname, so I foolishly edited /etc/hostname.

Unfortunately, any time I try to run the sudo command now, it fails because of a faulty gethostname() call. I realize now that I should have used the "hostname <new hostname>" command to change it, but I cannot edit /etc/hostname back to its original setting because I need root permissions!

Rebooting did not reset the hostname, nor did it update /etc/hosts.
What can I do to fix my stupid mistake?

[poulson]

I fixed the problem by following these steps:

1) Rebooting into recovery mode
2) Editing /etc/hostname back to its original values
3) Rebooting normally