Configure proxy authentication to work with Ubuntu Software Center

Go to /etc/apt. Create the file apt.conf if you don’t have it there. Write the following lines there.

Acquire::http::proxy "http://username:password@proxyserver:port/";
Acquire::https::proxy "https://username:password@proxyserver:port/";
Acquire::socks::proxy "socks://username:password@proxyserver:port/";
Acquire::ftp::proxy "ftp://username:password@proxyserver:port/";

Save it. You are done.

Keywords
apt , ubuntu , proxy

References
http://askubuntu.com/questions/77449/how-to-configure-proxy-authentication-to-work-with-ubuntu-software-center