linux synchronize two folder

Sync local folders:

rsync -avz /var/lib/mysql/mysql-bin.* /target/folder/

–a for archive mode (preserve all the attributes of each file and directory – ownership, permissions, etc),
-v for verbose mode (report a list of files processed by rsync)
-z for data compression to speed transfers up.

Sync remote folders over ssh:

rsync -avz ssh /root/origbinlog/* root@1922.168.1.196:/root/mysqlrecovery/binlogs/


DiskStation_230> rsync -avz chang@180:/usr/local/apache2/htdocs/RR/endeavor/download/dirty/ /volume1/lab/pdf/