Check "/home/arun/rsync/1/" and "/home/arun/rsync/2/" and deletes any files in folder "2" which are not in "1".
Sample output below :rsync -vrlptD --delete /home/arun/rsync/1/ /home/arun/rsync/2/
sending incremental file list
./
deleting 159
deleting 1586
deleting 158
sent 27 bytes received 15 bytes 84.00 bytes/sec
total size is 0 speedup is 0.00