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[–] Disappointed 0 points 3 points (+3|-0) ago 

When you say messed with it what did you use to mess with it?

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[–] thisisntright [S] 0 points 2 points (+2|-0) ago 

I ended up mounting the main hard drive (with the operating system on it) a second time. It didn't mess anything up right away - just when I had to reboot.

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[–] luckyguy 0 points 2 points (+2|-0) ago  (edited ago)

I wonder if this is a possible bug. Just to clairify because you were a little vauge.

You:

Mounted the / when you booted (automatically obviously).
You mounted it again while you were logged into your computer say to /mnt or any folder really.
Life continued on without interuption for a good while.
You turned off you computer and something was corrupted?

It doesn't seem right to me that that should break a computer.

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[–] Disappointed 0 points 3 points (+3|-0) ago 

Fair enough, this isn't something I've had to deal with before though and searching it doesn't show up much. Have you tried what @Ghengis_Khan mentioned?

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[–] zak_the_mac 0 points 4 points (+4|-0) ago 

Okay, so this isn't an answer to your question at all. Sorry.

BUT, could any programmers on here please learn this: when you find your fingers typing 'an error occurred' as an error message to be displayed, stop, delete that crap, and replace it with an actual error message that says what the error was!

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[–] Genghis_Khan 0 points 5 points (+5|-0) ago 

Since no one is answering with the specifics for this distro, I'll try to point you in the right direction. I don't remember the exact procedure here, but as you might already know the mounting table is contained in a file that (as far as older versions of Ubuntu go) can be regenerated via a command.

You'll want to google the following things. Also, stackexchange is really good with archiving this kind of information.

  • Booting a Live Ubuntu (you can usually accomplish this by simply burning the distro to an optical disc or properly writing it to a flash drive).
  • Mounting your old / partition (probably the root of your main hard disk) and executing chroot.
  • Executing the command to rebuild your mounting table.

Hopefully this will at least get you on the right path. FYI, it's also possible reinstall Linux without formatting the primary drive, and even creating a new partition and installing there. Beware, this sort of thing can get complicated really fast. If you have important data, I would back it up before doing anything else (by booting a live OS and mounting the partition and transferring the data to some other medium).

Good luck.