Ruby system programs

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Hai all,
Hope everybody fine.
But
I am not fine,because I got one assignment from my project head.

The problem is :-

1) To find the Memory usage
2) To find the CPU usage
3) To find the UPTIME Status
4) To find the Hard Disk space(used/available)
5) To find the status of Service running (like MYSQL)

I would like to know,how to write program.
Is there any way to find all the information above mentioned using Ruby?
If yes,Please let me know
Thanks advance
Regards
Hussain
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