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docs: document fusermount3 limitation in WSL #18

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Expand Up @@ -113,3 +113,32 @@ fs:
mountoptions: allow_other,nodev,nosuid
```
5. Restart your mount.

### fusermount3: mounting over filesystem ... is forbidden (WSL)

If you see:

```bash
/usr/bin/fusermount3: mounting over filesystem type ... is forbidden
mount failed: fusermount exited with code 256
```

This is a limitation of Windows Subsystem for Linux.

Cause:
* WSL restricts FUSE mounts on certain filesystem types
* Most commonly happens when mounting into `/mnt/c`, `/mnt/d` (Windows drives)

Fix:
Mount into a native Linux path instead:
```bash
mkdir -p ~/gitforgefs
gitforgefs mount ~/gitforgefs
```

NOT:

```bash
# This will fail in WSL
gitforgefs mount /mnt/c/somewhere
```