The same (or very similar) privilege issue comes into play when downloading sources _as root_ under /root, such as with the command 'apt-get source linux-image-extra-4.10.0-19-generic'.
The same (or very similar) privilege issue comes into play when downloading sources _as root_ under /root, such as with the command 'apt-get source linux-image- extra-4. 10.0-19- generic' .