I tried the system configuration as shown in this screenshot.
However, when I check the "show the value of the environment variables," all the fields blank out, and I cannot enter values in there. So it indicates no proxy
in the environment variables, and I think this is what software center / terminal will need. I can try the cntlm, but I'd have to install it through software center
or download / install the package and all its dependencies manually through the web browser.
I know there's commands to set environment variables in terminal, but I'm not very familiar with the syntax, and it defeats the purpose of having to enter it twice.
This seems like a rather serious bug in the release.