Ubuntu server installation

I installed ubuntu server along side ubuntu desktop.
Ubuntu server is not able to connect to internet automatically either by ethernet cable or by wifi. Help me to configure network configuration for ubuntu server.
While installing it is asking for network config.
There is no problem while booting etc.

You can visit here [https://help.ubuntu.com/stable/ubuntu-help/net-manual.html.en ] to solve your problem.
Thank you .

You can use Oracle VM Virtual box.