Table of Contents

Set Proxy

Temporary

export http_proxy="http://192.168.0.1"
export ftp_proxy="http://192.168.0.1"
export https_proxy="http://192.168.0.1"
export no_proxy="localhost, 127.0.0.1"

Single User

Create a .bashrc file inside the users home 

export http_proxy="http://192.168.0.1"
export ftp_proxy="http://192.168.0.1"
export https_proxy="http://192.168.0.1"
export no_proxy="localhost, 127.0.0.1"

Global

Edit /etc/sysconfig/proxy 

PROXY_ENABLED="yes"
HTTP_PROXY="http://192.168.0.1:3128"
HTTPS_PROXY="http://192.168.0.1:3128"
FTP_PROXY="http://192.168.0.1:3128"
NO_PROXY="localhost, 127.0.0.1"