#!/bin/sh

noofdirs=$(find . -mindepth 1 -maxdepth 1 -type d | wc -l)
lenofnod=$(echo -n "$noofdirs" | wc -m) ## Flag n to prevent newline count

for f in * ; 
do mv -n "$f" "$(date -r "$f" +"%Y%m%d_%H%M%S")_$f"; 
done

#open in vimv
#let @a=1 | g/^.\{0,16}/s//\=i.'.' | let i=i+1
#add zeroes in front if lenofnod = 1 
#add zeroes in front if lenofnod = 2