debian_set_time.sh

#!/bin/bash
#

#First, prompt user to set the timezone
sudo dpkg-reconfigure tzdata

#Restart NTP service, force time update
sudo service ntp stop
export NTPDATE_USE_NTP_CONF
sudo ntpdate-debian -t 10
sudo service ntp start

#Check with user if time was correct
LOCAL=`date`
UTC=`date -u`

echo ""
echo "Local time is now: $LOCAL"
echo "Universal time is now: $UTC"
echo ""
echo "If the time above is not correct, your network administrator or ISP may be blocking NTP packets."
echo "Do you want to adjust the time manually? [y/N]"

CHOICE="N"
read CHOICE

C=`echo ${CHOICE,,}`

if [ $C == "n" ] || [ $C == "no" ]; then
    exit 0
else
    RESULT=1
    while [ $RESULT -ne 0 ]; do
        echo "Please enter the correct local date and time as 'YYYY-MM-DD hh:mm:ss'"
        read INPUT
        date --set "$INPUT"
        RESULT=$?
    done
fi