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It'd be hard to have worked with Linux for over 20 years at this point since the first public Linux release happened just under 20 years ago (September 1991).

And even in the post, there are more factual errors... Ctrl+D doesn't ask a program to quit. How can you use Linux for 10+ years and not know why kill -9 is "force" and what the difference is from normal kill?

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My bad, my math is sucking today.

My brain thought "hm, 1999, now it's 2011, so add 10 to the 1900's to get 2000's, then add 10 more to get 2010's => 20 years".

I always find it interesting to post-mortem my logical blunders.

But sadly, the point stands regardless.

it's just asymmetric math :)

I said a very amateur enthusiast since 1999, which is closer to 10 years. And the Ctrl-D is what I said in my interview I apologize if it is not factual. Looking it up it appears to be end of file, is this correct, I will change my post to reflect this if so.

Yes, Ctrl + D sends an EOF to a program getting input from the console, this can be used to notify mail(1) that you are done typing your message and that it should send the message now.

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