git-annex/doc/tips/recover_data_from_lost+found.mdwn

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Suppose something goes wrong, and fsck puts all the files in lost+found.
It's actually very easy to recover from this disaster.
First, check out the git repository again. Then, in the new checkout:
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$ mkdir recovered-content
$ sudo mv ../lost+found/* recovered-content
$ sudo chown you:you recovered-content
$ chmod -R u+w recovered-content
$ git annex add recovered-content
$ git reset HEAD recovered-content
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$ rm -rf recovered-content
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$ git annex fsck
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The way that works is that when git-annex adds the same content that was in
the repository before, all the old links to that content start working
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again. So, this works as long as you're using one of the SHA* or other
checksumming backends, which is the default.