Perform an action in every sub-directory using Bash

Question

I am working on a script that needs to perform an action in every sub-directory of a specific folder.

What is the most efficient way to write that?

Answer 1

for D in `find . -type d`
do
    //Do whatever you need with D
done

Answer 2

find . -type d -print0 | xargs -0 -n 1 my_command

Answer 3

the accepted answer will break on white spaces if the directory names have them, and the preferred syntax is $() for bash/ksh. Use GNU find -exec option with +; eg

find .... -exec mycommand +; #this is same as passing to xargs

or use a while loop

find .... |  while read -r D
do
  ...
done