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While I was playing Minecraft, my computer (running Ubuntu) crashed and my game I was playing got corrupted. I've managed to trace the problem to the level.dat and the level.dat_old files. All the code in these files have been erased. Is there a way that I can get back the old code and thus restore my saved game?

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Do you have a backup system running? If not install one. Crashplan is nice. – Zoredache Mar 2 '12 at 3:44
@Zoredache I just started using Git for that reason. – m.n.wiser Mar 3 '12 at 15:29
up vote 0 down vote accepted

This video should help you, It has saved my world too, so I know that it works. If this doesn't help, try this video. (the second link's video has low volume, so if you don't hear anything, be sure to turn it up)

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These videos weren't able to help me since I was running Ubuntu, but I believe they are helpful to other users. Luckily, I found an earlier backup and was able to recover the files myself. – m.n.wiser Mar 3 '12 at 15:27
Oh, I'm sorry I didn't help, but good job getting your save back. – Garrett R Mar 4 '12 at 3:04

If the previous two videos don't help you, this one may:

(older video, done for minecraft 1.8, but it's worth a shot.)

In Ubuntu the 'saves' directory is under in ~/.minecraft. You will need to "show hidden files & folders" to see directories beginning with the period.

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