using apt-get behind proxy
Give below commands on terminal export http_proxy=http://username:password@proxy_ip_or_name:proxy_port/ export ftp_proxy=http://username:password@proxy_ip_or_name:proxy_port/
Give below commands on terminal export http_proxy=http://username:password@proxy_ip_or_name:proxy_port/ export ftp_proxy=http://username:password@proxy_ip_or_name:proxy_port/