Usage: gdbmtool [OPTION]... DBFILE [COMMAND [ARG ...]]
examine and/or modify a GDBM database

  -N, --norc                 do not read .gdbmtoolrc file
  -T, --timing               print timing after each command
  -b, --block-size=SIZE      set block size
  -c, --cache-size=SIZE      set cache size
  -d, --db-descriptor=FD     open database at the given file descriptor
  -f, --file=FILE            read commands from FILE
  -l, --no-lock              disable file locking
  -m, --no-mmap              do not use mmap
  -n, --newdb                create database
  -q, --quiet                don't print initial banner
  -r, --read-only            open database in read-only mode
  -s, --synchronize          synchronize to disk after each write
  -t, --trace                enable trace mode
  -x, --extended, --numsync  extended format (numsync)

  -h, --help                 give this help list
      --usage                give a short usage message
  -V, --version              print program version

Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options.

Report bugs to <bug-gdbm@gnu.org>.
gdbm home page: <http://www.gnu.org/software/gdbm>