title: Installation of a DHCP server on ubuntu vm?
body: <p>for my college work I need to set up a DHCP server on a ubuntu vm. I am connected via a vpn to the school network and accessed it through Putty. Everything works as planned but when I try to run sudo apt-get install isc-dhcp-server i get the following error message:</p>
  <p><a href="https://i.stack.imgur.com/3GVE4.png" rel="nofollow noreferrer">What seems to be the problem here?</a></p>
  <p>I normally use Windows so Ubuntu is very new to me.</p>
  <p>If anyone could give me some advice or maybe explain what the problem is, it would be very much appreciated</p>