when I am going to update my Ubuntu 14.04 I get following error:
Signature by key 8BADC1A02FC9C07FB8C20EC0BD11A6AA914BDF7E uses weak digest algorithm (SHA1)
(this is a plesk package)
through google I found out, that the algorithm SHA1 has been disabled since 1. January 2017.
The problem is, that the apt-get update aborts at this point, so I cannot update my other packages.
How can I solve it without reinstalling plesk?