I have a fresh install of ubuntu 1804 bionic in server version. During the install process I configured a proxy like http://x.x.x.x:xxxx. The problem now is for the moment that proxy is not longer available and I want to change to another external proxy.
I've tried already with changing the apt.conf file with the Acquire option and the export option on command line but every time I execute an apt command it still working with the old proxy configuration.
Where is store this proxy configuration asked in during the installation process
Is ther a way to configure an in-case-of-fail proxy? this to manage several proxy server and make the connection with the first in being available.
How can I change that initial configuration from the installation process.
Thanks in advance!