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Just annotations of little "how to's", so I know I can find how to do something I've already done when I need to do it again, in case I don't remember anymore, which is not unlikely. Hopefully they can be useful to others, but I can't guarantee that it will work, or that it won't even make things worse.
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Listing the average file size for all subfolders (+listing subfolders without ls or find)

Posted 08-03-2014 at 08:11 PM by the dsc
Updated 08-03-2014 at 09:04 PM by the dsc

A tiny "Frankenstein monster" one liner, adding a little bit from several sources/blogs/blog comments:

lsf | while read d ; do find ./"$d" -iname "*.*" -type f -printf "%k\n" | gawk '{sum += $1; n++;} END {print sum/n;}' |sed "s|$| -- $d|" ; done | sort -n

Where the first "command", "lsf" is actually a custom function:

lsf ()
for f in * ; do [ -d "$f" ] && echo $f ; done
I think it's a little bit better to parse than "ls -1 -d /*" or "find . -maxdepth 1 -type d". Only because it doesn't have two slashes after each folder name or "./" before. Even though the latter isn't that bad.

To get the ratios of "average of deviations above average" per deviations above average:

lsf | while read d ; do AVG="$(find ./"$d" -maxdepth 1 -iname "*.*" -type f -printf "%k\n" | gawk '{sum += $1; n++;} END {print sum/n;}' | sed 's|\..*||')k" ; devs=$(find ./"$d" -iname "*.*" -type f -maxdepth 1 -size +$AVG | wc -l) ; devsize=$(find ./"$d" -maxdepth 1 -iname "*.*" -type f -size +$AVG -printf "%k\n" | gawk '{sum += $1; n++} END {print sum/n;}' | sed 's|\..*||') ; echo "$(echo "${devsize:-1}/${devs:-1}" | bc -l) -- $AVG -$d "; done | sort -n

Can give lots of errors due to division by 0 and such things. Warning: I'm not good at math.
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