title: isc-dhcp-server status failed: Failed with result 'exit code'
body: <p>I setup a simple dhcp-server with isc-dhcp-server, but when I start the service, the status is in failed with the message &quot;failed with result 'exit code' &quot;.</p>
  <p><a href="https://i.stack.imgur.com/CQC1e.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CQC1e.png" alt="enter image description here" /></a></p>
  <p>And yes, I did configure the files /etc/dhcp/dhcp.conf and /etc/default/dhcpd.conf</p>
  <p><a href="https://i.stack.imgur.com/5AAkC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5AAkC.png" alt="enter image description here" /></a>
  <a href="https://i.stack.imgur.com/mPh5p.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mPh5p.png" alt="enter image description here" /></a>
  <a href="https://i.stack.imgur.com/Rba4F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Rba4F.png" alt="enter image description here" /></a></p>
  <p>I checked more information with the command <code>journalctl -ex</code> the show the next input. But I dont know what the input said, because I configured the interface and dhcp server.</p>
  <p><a href="https://i.stack.imgur.com/QU3PG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QU3PG.png" alt="enter image description here" /></a></p>
  <p>I dont know what doing to solve this issue. Somebody know what doing in this case.</p>