rsync

scp is transfer the files/folder to other location/PC

rsync is synchronize the file/folder

To sync local books folder to dist(maybr server) books folder

rsync -auvc user@some_ip_addr:~/books/ books/

• a: for archive
• u: update, skip files that are newer
• v: for verbosity
• c: checksum, update base on file checksum, not mod-time and size change