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I would like to run a dropbox client on my server to create a backup of all the files that are hosted by dropbox.
As I don't trust dropbox, I want the client to be constrained to a single directory. It must only be allowed to read and write into that one directory (and sub directories below that directory).
What's the best way to do this? I can think of the following ways, each taking more resources than the previous solution.
0) Run dropbox as a dedicated user, and give that user only access to one single directory.
1) Run dropbox in a chroot jail
2) run dropbox in a container, with a shared folder to the host machine
3) run dropbox in a virtual machine, with a shared folder to the host machine
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