Errores comunes
   
   
   --delete
       Catastrofal, si confundo fuente y destino
   
   /usr/local/bin/    <--->    /usr/local/bin
   
   rsync   -avz   root@host:/usr/local   backup/host/local
   -> backup/host/local/local
   
   rsync   -avz   root@host:/usr/local/   backup/host/
   -> backup/host/<contenido de local>
   
   rsync   -avz   root@host:/usr/local   backup/host/
   rsync   -avz   root@host:/usr/local/   backup/host/local/