Set proxy on linux terminal

The linux terminal sets the proxy debian to provide a convenient software package management tool "New pack manager", which contains the proxy server settings, but it can only be used in the graphic interface. set the apt proxy method for www.2cto.com on the terminal: Step 1: $ export http_proxy = http: // user: pass @ proxy_server_IP: port (but after the terminal is closed, this setting becomes invalid. to make the settings valid for a long time, you can ~ /. Add the preceding command to bashrc .) step 2: $ sudo vi/etc/apt. add a sentence to conf: Acquire: http: proxy "http: // username: password @ proxy_adress: port_number"; unset proxy: $ unset http_proxy