How do I compare file names in two directories in shell script?

Question

Right now, this is what my code looks like:

#!/bin/bash

Dir1=$1
Dir2=$2

for file1 in $Dir1/*; do
    for file2 in $Dir2/*; do
        if [[ $file1 == $file2 ]]         


        

Answer 1

Files that are in both Dir1 and Dir2:

find "$Dir1/" "$Dir2/" -printf '%P\n' | sort | uniq -d

Files that are in Dir1 but not in Dir2:

find "$Dir1/" "$Dir2/" "$Dir2/" -printf '%P\n' | sort | uniq -u

Files that are in Dir2 but not in Dir1:

find "$Dir1/" "$Dir1/" "$Dir2/" -printf '%P\n' | sort | uniq -u