Rsync is a command line tool to copy files between different hosts.

rsync -a <source> <destination>

The -a flag ensures everything's copied recursively, ensures permissions are copied correctly, an other things.

Copy a directory from a remote server to your machine:

rsync -av public/media

By suffixing the source directory with /, its contets are placed inside the destination directory. Otherwhise you'd end up with public/media/media.