QUES: onsdag den 19 September 2012

correct the punctuation.

CORRECTED: onsdag den 19. September 2012

QUES: Your complaints are for me signs that you are unhappy with yourself

correct the punctuation.

CORRECTED: Your complaints are for me signs that you are unhappy with yourself.

QUES: You can back up other pcs onto the local pc as long as our local pc can ssh to the other pcs and as long as you have room on your hard drive

correct the punctuation.

CORRECTED:
You can back up other pc's onto the local pc, as long as our local pc can ssh to the other pc's (and as long as you have room on your hard drive).