Setting proxy for apt from terminal

Okay just solved it. Adding following line to /etc/apt/apt.conf has solved the problem: Acquire::http::proxy "http://10.1.3.1:8080/";

If file does not exist, create it. Do not confuse it with apt.conf.d directory.

The file:

/etc/environment

Is the correct place to specify system-wide environment variables that should be available to all processes. See https://help.ubuntu.com/community/EnvironmentVariables for details. Note that this is not a script file but a configuration file.

If you want this for the specified command only, use (as root):

http_proxy=http://10.1.3.1:8080 apt-get update

Edit your:

gedit /etc/profile

Enter the details in this format.

export http_proxy=http://username:password@proxyhost:port/ 
export ftp_proxy=http://username:password@proxyhost:port/

Then run the

sudo apt-get update

That should do it for you.

As stated above you can enter the proxy into apt.conf (Piyush Credit)