Sync your local files against a remote
$ rsync --partial --progress --rsh=ssh SOURCES DEST_HOST:DEST_PATH
Example
$ rsync --partial --progress --rsh=ssh *.zip user@remote:/home/user/backup
Sync local source to local destination directories
$ rsync -av /source/ /destination/
# (after checking)
$ rm -rf /source/
Sync remote calibre library to local
rsync -av --partial --progress remote_host:/home/user/calibre_backup ./