create list of all files in every subdirectories in bash

Question

I trying to write script in bash which will loop over all subdirectories, starring from given path, and will create list with md5 sums of all files in current directory.

I need something like ls -R, but I'm not sure how to start

Answer 1

There is a very easy way of doing this with find:

find . -type f -exec md5 {} \;

The command finds all files (-type f), and executes the command md5 on each file (-exec md5 {} \;).

Answer 2

There is also a program called tree, but you can simulate it with only shell builtins:

#!/bin/sh
DIR=${1:-`pwd`}
SPACING=${2:-|}
cd $DIR
for x in * ; do
    [ -d "$DIR/$x" ] &&  echo "$SPACING\`-{$x" && $0 "$DIR/$x" "$SPACING  " || \
    echo "$SPACING $x : MD5=" && md5sum "$DIR/$x"
done

Note it requires a full path argument (or none for current directory)

Its not as fast as find (though there are plenty of ways to speed it up that make the code more complicated to follow), but gives a graphical representation of the tree structure. You can modify it to not follow symlinks by adding- && [ ! -L "$DIR/$x" ] or to only list directories: remove the || echo $SPACING $x