Upgrade to 16.04 (from 14.04) server

[Rodrigues Nuno]

I performed a upgrade from Ubuntu server 14.04 to 16.04 and it seems something in the update went wrong. Below the log from screenlog.0

Now ?I'm unable to do any package installation or update as I always receive the error with /sbin/udevd

I checked and /sbin/udevd is not existing. As requested the files of /var/log/dist-upgrade/ are attached

chmod: cannot access '/sbin/udevd': No such file or directory
Exception during pm.DoInstall(): E:Problem executing scripts DPkg::Pre-Invoke 'chmod -x /sbin/udevd', E:Sub-process returned an error code

Could not install the upgrades

The upgrade has aborted. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Please report this bug in a browser at
http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug
and attach the files in /var/log/dist-upgrade/ to the bug report.
E:Problem executing scripts DPkg::Pre-Invoke 'chmod -x /sbin/udevd',
E:Sub-process returned an error code

Upgrade complete

The upgrade has completed but there were errors during the upgrade
process.

To continue please press [ENTER]

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.