Runs ntpdate if the clock is off by more than 10 seconds. Useful for VMhosts

set-date.sh

#!/bin/sh

DIFF=`ntpdate -q pool.ntp.org | awk '/offset ([-0-9\.]+) sec/ {i=int($10); print (i >= 0) ? i : 0 - i}'`

# set the date if the difference is > 10 seconds
if [ $DIFF -gt 10 ]; 
then
    echo -n "Time off by $DIFF seconds. Setting date ..."
    sudo ntpdate pool.ntp.org
    echo "one";
fi