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bashextglob

How to get the list of files of specific extension in bash in just one line?

This is how I can get *.png files from the positive folder sub-directories:

FILES=./positive/*/*.png

How to modify this command to get both *.png, *.jpg and *.bmp files? Just one line.

Solution

  • You could just use find:

    find ./positive/ -name *.png

    In order to use it for *.png*, *.jpg and *.bmp, you may take advantage of -o option which stands for "or" keyword. With it, you can join a few -name <NAME> expressions:

    find ./positive/ -name *.png -o -name *.jpg -o -name *.bmp

    or alternatively (if you are keen on graphical or operator):

    find ./positive/ -name *.png || -name *.jpg || -name *.bmp

    Furthermore, if you are not certain that all of the files have lowercase names - you may need to use -iname (case insensitive) option instead of -name.