apt/dselect/update

#!/bin/sh
set -e

# Get the configuration from /etc/apt/apt.conf
OPTS="-f"
APTGET="/usr/bin/apt-get"
APTCACHE="/usr/bin/apt-cache"
DPKG="/usr/bin/dpkg"
CACHEDIR="/var/cache/apt"
PROMPT="no"
RES=`apt-config shell OPTS DSelect::UpdateOptions \
      DPKG Dir::Bin::dpkg APTGET Dir::Bin::apt-get \
      APTCACHE Dir::Bin::apt-cache CACHEDIR Dir::Cache \
      PROMPT DSelect::PromptAfterUpdate`
eval $RES

$APTGET $OPTS update

echo "Merging Available information"
rm -f /var/cache/apt/available
$APTCACHE dumpavail > $CACHEDIR/available
$DPKG --update-avail $CACHEDIR/available
rm -f $CACHEDIR/available

if [ $PROMPT = "yes" ]; then
   echo "Press enter to continue." && read RES;
fi

exit 0