http_proxy in ubuntu
If you are working in the internet with ubuntu, you may need some software to be installed before it is being used actually.
If you install ubuntu with a live CD, you will not have VLC Media player, etc.
Proxy setup needed to install/update software in ubuntu
1. proxy support for Synaptic package manager
Go to Settings-> preferences –> Network Tab, click manual proxy configuration and then set the proxy ip and port
2. proxy support for apt-get
Open the file /root/.bashrc and type the following line
If your proxy server does not have username/password combination then include the following line
(NB: .bashrc file is available for all the users of ubuntu, for example if the Linux user login name is “pradeepkumar” then there will be a .bashrc file at /home/pradeepkumar/, but setting the http_proxy in those files will be of no use, because ubuntu allows installation/upgrading of software only for super users ie root, so /root/.bashrc alone will be set with the http_proxy variable)