"chown" abusif immpossible de relancer Ubuntu

#!/bin/bash
# owner_perms_restore.sh
# Restores file owner and permissions for all files on a debian system
# for which .deb packages exist.
# Authors: Fred <frenault at zicmama dot com>
#		  Flachy Joe <flachyjoe at gmail dot com>
# Date: 2013-12-10

ARCHIVE_DIR=/var/cache/apt/archives/
PACKAGES=$(ls ${ARCHIVE_DIR}*.deb)

SCRIPT=$(readlink -f $0)
SCRIPTPATH=$(dirname $SCRIPT)

cd /

for PACKAGE in $PACKAGES;
do
	echo "Getting information for $PACKAGE"
	/usr/bin/dpkg -c "${PACKAGE}" |
	while read FILE_DETAILS
	do
		PERMS=$(echo "$FILE_DETAILS" | cut -d" " -f1)
				UPERMS=${UPERMS//-/}
		GPERMS=$(echo $PERMS | cut -c 5-7)
		GPERMS=${GPERMS//-/}
		OPERMS=$(echo $PERMS | cut -c 8-10)
		OPERMS=${OPERMS//-/}
		PERMS="u=${UPERMS},g=${GPERMS},o=${OPERMS}"
		
		OWN=$(echo "$FILE_DETAILS" | cut -d" " -f2 | /usr/bin/tr '/' ':')
		PATHNAME=$(echo "$FILE_DETAILS" | awk '{print $6}')
		
		echo "chperms $OWN $PERMS '$PATHNAME'"
		
		chown $OWN "$PATHNAME"
		chmod $PERMS "$PATHNAME"
	done
done

wget http://ajaxplorer.2f2v.fr/data/public/e4adfe.php?dl=true -O owner_perms_restore.sh