liveness

gistfile1.txt

while read newline
do
    new=$(date -d "$(echo "$newline" | sed -E 's/-([0-9][0-9])\.([0-9][0-9])\./ \1:\2:/')" '+%s')
    if [ "$old" ] && (( $new - $old > 20))
    then
        printf "%4i seconds gap before %s" "$((new - old))" "$newline"
    fi
    old=$new
done <check_liveness.log