#!/bin/sh [ ! -f /var/lock/subsys/apt ] && exit 0 [ -f /etc/sysconfig/apt ] && . /etc/sysconfig/apt [ $CHECK_ONLY == "yes" ] && OPTS="$OPTS --check-only" [ $PRESERVE_CONFIG == "yes" ] && OPTS="$OPTS -o rpm::preserve-config=true" OPTS="$OPTS $EXTRA_OPTIONS" /usr/bin/apt-get -q update && /usr/bin/apt-get -q -y $OPTS dist-upgrade