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list all file extensions in a directory

Terminal - list all file extensions in a directory
ls -Xp /path/to/dir | grep -Eo "\.[^/]+$" | uniq
2010-08-12 16:32:54
User: karpoke
Functions: grep ls
0
list all file extensions in a directory

If we want files with more than one extension, like .tar.gz, only appear the latest, .gz:

ls -Xp /path/to/dir | grep -Eo "\.[^./]+$" | uniq

Alternatives

There are 3 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
10

... 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
4

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
2

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
1

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
1

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

Know a better way?

If you can do better, submit your command here.

What others think

You have to sort results before uniq.

echo -e "1\n2\n1" | uniq

From man uniq :

Note: 'uniq' does not detect repeated lines unless they are adjacent. You may want to sort the

input first, or use `sort -u' without `uniq'.

Comment by dooblem 255 weeks and 2 days ago

@dooblem, I think that it's not necessary because the flag -X of ls sorts alphabetically by extension, so repeated lines are adjacent.

Comment by karpoke 255 weeks and 1 day ago

Your point of view

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