To unmount a partition, `/device/to/backup` for example, in linux, you can run the following:

```bash
sudo umount /device/to/backup
```

- The `umount` command detaches the mentioned filesystem(s) from the file hierarchy. A filesystem is specified by giving the directory where it has been mounted. In this example the filesystem/partition is `/device/to/backup`.
  
- The `sudo` command is often needed unless you are running the `umount` command as the root user as the unmount command is
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