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Please show us a complete sample log file:
####LOG FILE ###
2014-08-04
$Date=2014-08-04 $hour
$Date2=2014-08-04 $onehourfromnow

variables collected (...)
sumations (....)
totalcolumns(...)...

Some people may suggest calling date twice, but if you do that just before and just after a change in the minute, the two values won't be related the way you want them. (As a close to worst case,...

Don't you understand he is unable to think a way out. If he could write the code why would he come to ask for help. He has an idea but not the necessary coding skills. So all is he asking for some...

You can get exactly what you asked for with

$ VAR=$(date +"%F %H:%M.%s")
$ echo ">> ${VAR:0:23}"
>> 2014-08-01 14:23.140692 ...but I have my doubts that's what you actually want.

What,...

You might want to comment out the echo inside that loop before deploying. I'm not sure where all those debug statements will end up, if anywhere. Don't want them piling up in some neglected logfile...

$! is the process ID of whatever you backgrounded (i.e, ran with &) most recently inside the current shell.

So if you did ( .... ) & you would get the process ID of the subshell.

If you did...

Again, I'm not sure what 'kill -- -$$' is even trying to do. -- is not a valid option for kill, and killing your own shell would kill everything, leaving it not able to do anything. And -(number)...

(
echo "Hi!"
# Slow thing ) &

PID="$!"

for X in 1 2 3 4 5
do
ps "$PID" >/dev/null 2>/dev/null || break
sleep 1
done

if ps "$PID" >/dev/null 2>/dev/null...