lol scared the crap out of me as well :p
You need to add this line
To the file inittab
You can edit files using the VI program in linux .
Firstly login and type SU to get your prompt from [username@drivename] to [root@drivename]
Type VI /etc/inittab and hit enter . The file opens up .
Scroll down to the bottom of the section marked #Startup the system
Press I , the line at the bottom of the screen should change to an I to indicate your in insert mode
Now add the line
Once your happy its correct then hit ESC to leave insert mode
Now you need to press : . The prompt at the bottom will change to : , Now type wq and hit enter . This saves and exits VI .
You have now added SSH to your startup file . Reboot your MBWE and your SSH should be permanent .