Media change while installing apache2 I've got a fresh copy of Ubuntu Server 15.04 and installed it via "Easy Install" in VMWare WorkStation 12. After it installed,i've logged in to my account and tried to install `apache2` with this command: sudo apt-get install apache2 and got this message: > media change: please insert the disc labled Ubuntu-server 15.04 _Vivid Vervet_ \- Release amd64 (20150422) in the drive '/media/cdrom/' and press enter I'm sure that the internet connection is okay. But how can I avoid this error and install `apache2`? I have installation ISOl I can use it as CD, also, I have an internet connection to download, and I can `ping google.com` successfully. ![media error on Ubuntu Server](

You need to edit your `/etc/apt/sources.list`. Simply open it in your text editor, and comment the lines referring to `cdrom` sources; for example:


deb cdrom:[Ubuntu 15.04 _Vivid Vervet_.../ vivid main restricted


Save and exit, then run `apt-get update` and `apt-get install apache2` again.

This happened by default since you installed from CD.