Added two exercises to 06-find/

[cfgauss]

This is part of the completion of Software Carpentry instructor training.

[gvwilson]

Thanks for the pull request - can you please mail Greg Wilson with the link? (Don't know which human corresponds to the 'cfgauss' account.)

[cfgauss]

Sorry for the anonymity. I added two exercises to 06-find in shell-novice.
-Bill McClung

[gvwilson]

Thanks, Greg

[gcapes]

Thanks for the PR @cfgauss!

These are great exercises (for advanced learners)!

Unfortunately, given how long this PR has been open, the formatting of the lesson and the contents of the molecules directory has changed a bit, and it would also be good to have a solution. Would you be interested in updating this PR, or should I finish it for you?

I would be tempted to merge the questions, because part 2 ,while useful, consolidates earlier material rather than the grep/find material.

The solution below works - is this what you had in mind?

for file in *.pdb
	do
		echo -n $file " "
		grep -c ATOM $file
	done | sort -k 2 -n

[cfgauss]

@gcapes I agree that this PR is "old" and doesn't pertain to the current version of the lesson. Your solution is what I had in mind if you decide to include a merged question. I'd be happy to close the pull request if you wish.

[cfgauss]

Exercise has been commited to 07-find.