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Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
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Setting up udev (228-4ubuntu2) ...
addgroup: The group `input' already exists as a system group. Exiting.
update-initramfs: deferring update (trigger activated)
insserv: Service mountkernfs has to be enabled to start service udev
insserv: exiting now!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package udev (--configure):
 subprocess installed post-installation script returned error exit status 1