** Description changed:

  [Impact]
  When ubuntu 18.04 server is trying to do an OEM installation using 
oem-config-firstboot, the  ubiquity breaks the symlink /etc/resolv.conf -> 
/run/systemd/resolv/stub-resolv.conf, replacing /etc/resolv.conf with a 0-byte 
file and thereby breaking name resolution.
  
  [Test Case]
  The reproducer steps:
  1. Prepare ubuntu-server with d-i version
  2. Install iso
- 3. apt install oem-config
- 4. apt-get --purge -y autoremove ubiquity-frontend-gtk/ubiquity-frontend-kde 
(it depends on the frontend what the system used by default, check this by 
commanding "oem-config -q")
+ 3. apt install oem-config ubiquity-frontend-debconf oem-config-debconf
  5. oem-config-prepare -q
  6. reboot
  7. enter oem-config and finish it
  8. check if /etc/resolv.conf is broken (actually it becomes a zero-byte file)
  
  [Regression potential]
  The fix is simple, merely adding a service to oem-config.target's Wants=. 
Even if the service somehow fails to start or is not present on a system, the 
other functionality of oem-config will be unaffected.

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https://bugs.launchpad.net/bugs/1777900

Title:
  oem-config breaks the systemd resolved link for /etc/resolv.conf in
  18.04 server

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