==== Reset Root Password ====
Add this to your (grub's kernel line or grub2's linux line) and boot:
<code>
init=/bin/bash
</code>
Then just use passwd to reset the root password:
<code>
passwd
</code>
On old systems you may need to remount the filesystem:
<code>
mount -o remount,rw /
</code>

==== Sudo Without Password ====
/etc/sudoers
<code>
username ALL=(ALL) NOPASSWD: ALL
</code>