debian auto-update system

#!/bin/bash
LOGFILE=~/logs/apt-log.log
APTLOG=~/logs/apt-upgrade.log
TMPLOG=~/logs/tmp1.log
TMPLOG2=~/logs/tmp22.log
DATEFMT=%X:%x
SHNAME=`basename $0`
SLEEP=5m    #wait till box is presumably less-loaded

echo -e "$SHNAME start sleep $SLEEP \t"`date +$DATEFMT` > $TMPLOG2;
cat $LOGFILE >> $TMPLOG2;
mv $TMPLOG2 $LOGFILE;
sleep $SLEEP;

sudo apt-key update;

sudo apt-get autoclean; echo -e "$SHNAME autoclean \t\t"`date +$DATEFMT` > $TMPLOG2;
cat $LOGFILE >> $TMPLOG2;
mv $TMPLOG2 $LOGFILE;

sudo apt-get autoremove -y; echo -e "$SHNAME autoremove \t\t"`date +$DATEFMT` > $TMPLOG2;
cat $LOGFILE >> $TMPLOG2;
mv $TMPLOG2 $LOGFILE;

sudo apt-get update; echo -e "$SHNAME update \t\t"`date +$DATEFMT` > $TMPLOG2;
cat $LOGFILE >> $TMPLOG2;
mv $TMPLOG2 $LOGFILE;

echo -e "\n::: "`date +$DATEFMT`" :::" > $TMPLOG;
sudo apt-get upgrade -yq >> $TMPLOG;
cat $APTLOG >> $TMPLOG;
mv $TMPLOG $APTLOG;

#echo -e "$SHNAME dist-upgrade \t\t"`date +$DATEFMT` > $TMPLOG2;
#sudo apt-get dist-upgrade -yq >> $TMPLOG;
#cat $LOGFILE >> $TMPLOG2;
#mv $TMPLOG2 $LOGFILE;

sudo apt-get clean -y; echo -e "$SHNAME clean \t\t\t"`date +$DATEFMT` > $TMPLOG2;
cat $LOGFILE >> $TMPLOG2;
mv $TMPLOG2 $LOGFILE;

sudo msfupdate; echo -e "$SHNAME msfupdate \t\t"`date +$DATEFMT` > $TMPLOG2;
cat $LOGFILE >> $TMPLOG2;
mv $TMPLOG2 $LOGFILE;

exit 0