File and folder synchronization with rsync

• https://help.ubuntu.com/community/rsync

rsync -r -t -l -v --size-only --modify-window=1 
   -i --log-file="/home/userx/rsync.log" 
   -b --backup-dir="/home/userx/backup_dir/" 
   --delete-after "/home/userx/from_dir/" "/home/userx/to_dir/"

Options:

-n                 dry run only, no changes will be made
-r                 recursive subfolders
-t                 with timestamps
-l                 symbolic links as symbolic links 
-v                 verbose
--size-only        compare size/date/time only (fast)
--modify-window=1  compare time with mswindows accuracy
-b --backup-dir    backup modified and deleted files in backup-dir
--delete-after     delete destination files after sync is done (needs space)
-i --log-file      specify logfile
--exclude          exclude certain files (like "*.sqlite") and folders (like "Cache/")
--max-size=1.5g    skip files larger than 1.5Gb