I was trying to install Skype, but everytime I can't connect to an IP-address. My wifi is fine, my computer as well. I don't know what it could be. Presently I am using Ubuntu [15.04] version and am new to this environment. Kindly fix this problem.
It says:
missing cdrom://Ubuntu 15.04 Vivid Vervet - Release amd64 (20150422) vivid/main amd64 Packages
missing cdrom://Ubuntu 15.04 Vivid Vervet - Release amd64 (20150422) vivid/restricted amd64 Packages missing cdrom://Ubuntu 15.04 Vivid Vervet - Release amd64 (20150422) vivid/main i386 Packages
missing cdrom://Ubuntu 15.04 Vivid Vervet - Release amd64 (20150422) vivid/restricted i386 Packages
uname -a
in the terminal and paste the output