/usr/bin/tdbbackup: invalid option -- '-'
Usage: tdbbackup [options] <fname...>

   -h            this help message
   -s suffix     set the backup suffix
   -v            verify mode (restore if corrupt)
   -n hashsize   set the new hash size for the backup
   -l            open without locking to back up mutex dbs
   -r            open with read only locking