Delete extraneous files from destination (--delete). This tells rsync to delete all files from the receiving side that are not present on the sending side, but only for the directories that are being synchronized.
Eliminar do destino os ficheiros superfluos (-- delete). Isto indícalle a rsync que elimine todos os ficheiros do lado que recibe que non estean presentes no lado que envía, mais só dos directorios que se estean a sincronizar.