When we use ubuntu 16.04 or higher normal proxy setting will not work. If your internet is not working then set following things
sudo gedit /etc/environment
Add following lines in the environment file.
http_proxy=”http://proxyserveripaddress:portno”
https_proxy=”http://proxyserveripaddress:portno” ftp_proxy=”http://proxyserveripaddress:portno”
socks_proxy=”http://proxyserveripaddress:portno”
For example if your proxy server ip address is 192.168.0.1 & port address is 8080
http_proxy=”http://192.168.0.1:8080″
https_proxy=”http://192.168.0.1:8080″ ftp_proxy=”http://192.168.0.1:8080″ socks_proxy=”http://192.168.0.1:8080″
Save the file and
Reboot
