In my case it's only the Virtualbox Repo
W: http://download.virtualbox.org/virtualbox/debian/dists/xenial/InRelease: Signature by key 7B0FAB3A13B907435925D9C954422A4B98AB5139 uses weak digest algorithm (SHA1)
In my case it's only the Virtualbox Repo
W: http:// download. virtualbox. org/virtualbox/ debian/ dists/xenial/ InRelease: Signature by key 7B0FAB3A13B9074 35925D9C954422A 4B98AB5139 uses weak digest algorithm (SHA1)