How to go to each directory and execute a command?

Question

How do I write a bash script that goes through each directory inside a parent_directory and executes a command in each directory

Answer 1

If the toplevel folder is known you can just write something like this:

for dir in `ls $YOUR_TOP_LEVEL_FOLDER`;
do
    for subdir in `ls $YOUR_TOP_LEVEL_FOLDER/$dir`;
    do
      $(PLAY AS MUCH AS YOU WANT);
    done
done

On the $(PLAY AS MUCH AS YOU WANT); you can put as much code as you want.

Note that I didn't "cd" on any directory.

Cheers,