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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
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list all file extensions in a directory

Terminal - list all file extensions in a directory
ls | grep -Eo "\..+" | sort -u
2011-02-14 04:52:43
User: berr
Functions: grep ls sort
list all file extensions in a directory

A shorter version


There are 2 alternatives - vote for the best!

Terminal - Alternatives
find . -type f | awk -F'.' '{print $NF}' | sort| uniq -c | sort -g
2011-02-14 09:15:29
User: cp
Functions: awk find sort uniq
Tags: uniq ls grep

... plus do a sort according frequency

ls -Xp | grep -Eo "\.[^/]+$" | sort | uniq
2011-02-10 20:47:59
User: Amarok
Functions: grep ls sort
Tags: uniq ls grep

Works on current directory, with built-in sorting.

find /some/path -type f -printf '%f\n' | grep -o '\..\+$' | sort | uniq -c | sort -rn
2013-03-18 14:42:29
User: skkzsh
Functions: find grep sort uniq

Get the longest match of file extension (Ex. For 'foo.tar.gz', you get '.tar.gz' instead of '.gz')

find /path/to/dir -type f | grep -o '\.[^./]*$' | sort | uniq
2010-08-12 14:32:48
User: dooblem
Functions: find grep sort

Just a little simplification.

find /path/to/dir -type f -name '*.*' | sed 's@.*/.*\.@.@' | sort | uniq
2010-08-12 15:48:54
User: putnamhill
Functions: find sed sort

If your grep doesn't have an -o option, you can use sed instead.

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