Looks like homework, but doesn't fit the pattern. Most homework posters never make it past maybe 5 posts.
why haven't i got any posts back yet? >.<
Where did you get the idea that you should expect replies in under 1 hour? If you post a question at 6:30 PST:
The west coast is eating dinner.
The east coast is on their way to bed
Europe is sound asleep
and in the middle east they are just having breakfast.
This doesn't leave many people to answer your urgent question.
Q#2: By setting the permissions and maybe group ownership.
Look for Bash Guide for Beginners.