Finding duplicate directories in separate directories in unix

Question

I have 2 directories , dir1 and dir2.

There are some directories in them. Suppose dir1 has a,b and c directories and dir2 has c,d and e.

I need a script that will find out the duplicate directories in dir1 and dir2,in this case, "c" and log it into a separate file,say,duplicate.lst.

Answer 1

DIR1=dir1
DIR2=dir2

## find all subdirectories of `dir1` by using subdir/. and loop
for SUB in `cd $DIR1; echo */.`
do
     ## for each check if it exists in $DIR2
     if [ -d $DIR2/$SUB ]; then
          echo "Duplicate: "`dirname $SUB`
     fi
done