Question

I have two variables
$a and $b

and

$a=Source/dir1/dir11
$b=Destination/dir1/dir11

$a and $b changes but initials Source/ and Destination/ remains same.
I want to compare $a and $b without Source/ and Destination/

how should I do it?
Following code I am using

   SOURCE_DIR_LIST=`find Source/ -type d`
   DEST_DIR_LIST=`find Destination/ -type d`

for dir_s in $SOURCE_DIR_LIST
do
    for dir_d in $DEST_DIR_LIST
    do

        if [ ${dir_s/Source\//''} == ${dir_d/Destination\//''} ]
        then
                echo " path match = ${dir_s/Source\//''}"

        else
             echo "path does not match source path = ${dir_s/Source\//''} "
             echo " and destination path= ${dir_d/Destination\//''} "
        fi
    done
done

But output is coming like as follow

 path match = ''
./compare.sh: line 9: [: ==: unary operator expected
path does not match source path = ''
 and destination path= ''dir2
./compare.sh: line 9: [: ==: unary operator expected
more

Answer 1

if [ ${a/Source/''} == ${b/Destination/''} ]
then
  # do your job
fi