You may sometimes notice that your installation just hangs when it reached a certain percent during installation. The reason is probably you’re behind a proxy and it does not allow you to access the repository you are supposed to connect to.

The solution is simple. Edit your apt.conf file under /etc/apt and you’re good to go. Just follow the following steps.

1. open Terminal
2. sudo mousepad /etc/apt/apt.conf
3. Add the following lines:
   Acquire::http::Proxy “your.proxy.com:port”;

Note: This setting works just fine on my setup.

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