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title = "FAQ"
weight = 1000
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### My container runs fine with `runc` but fails with `runsc`
If you’re having problems running a container with `runsc` it’s most likely due
to a compatibility issue or a missing feature in gVisor. See
[Debugging](../debugging/).
### When I run my container, docker fails with: `flag provided but not defined: -console`
You're using an old version of Docker. See [Docker Quick Start](../docker/).
### I can’t see a file copied with: `docker cp`
For performance reasons, gVisor caches directory contents, and therefore it may
not realize a new file was copied to a given directory. To invalidate the cache
and force a refresh, create a file under the directory in question and list the
contents again.
As a workaround, shared root filesystem can be enabled. See [Filesystem](../filesystem/).
This bug is tracked in [bug #4](https://github.com/google/gvisor/issues/4).
Note that `kubectl cp` works because it does the copy by exec'ing inside the
sandbox, and thus gVisor's internal cache is made aware of the new files and
directories.
### What's the security model?
See the [Security Model](../../architecture_guide/security/).
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