Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

You can setup proxy in a terminal by export environment variables http_proxy and `https_proxy'.

export http_proxy='proxy_server:port'
export https_proxy='proxy_server:port'

However, you might find the exported environment variables are not visible to sudo. This can be resovled by simplying adding the -E (preserve environment) option to sudo.

sudo -E command_to_run

For more discussions, please refer to Environment Variables and Secure Path for sudo .