My University Campus has Ubuntu Repos on the Local Server.
Also, we use a proxy server to connect to the Internet.
Now, my Repository is the Campus Local Server, but I do have a lot PPAs installed in my system.
When I do
apt-get update through the Proxy Server, even the connections to the Local Server go via the Proxy Server, making the whole process very slow.
If I don't use the Proxy Server, then the PPAs don't get updated.
How can I do
apt-get update, such that only PPAs use the Proxy Server, and the other Repos get updated directly from the Local Server without going through the Proxy Server.