Setting up Proxy for debian OS using CLI

Create proxy file using VIM or nano 

sudo vim /etc/profile.d/proxy.sh

Populate your proxy values.

# set proxy config via profie.d - should apply for all users
# http/https/ftp/no_proxy
export http_proxy="http://192.10.1.20:8080/"
export https_proxy="http://192.10.1.20:8080/"
export ftp_proxy="http://192.10.1.20:8080/"
export no_proxy="127.0.0.1,localhost"

# For curl
export HTTP_PROXY="http://192.10.1.20:8080/"
export HTTPS_PROXY="http://192.10.1.20:8080/"
export FTP_PROXY="http://192.10.1.20:8080/"
export NO_PROXY="127.0.0.1,localhost"

Add any additional IP address to be excluded to the NO_PROXY & no_proxy environment variables. When done add execution bit to the script created.

sudo chmod +x /etc/profile.d/proxy.sh

Source the file for runtime use:

source /etc/profile.d/proxy.sh

Confirm proxy has been loaded in your environment.

$ env | grep -i proxy