One command option must be present.
[root@web2 init.d]#  omp --help
Uso:
  omp [OPCIÓN…] - OpenVAS OMP Command Line Interface

Opciones de ayuda:
  -?, --help                       Mostrar opciones de ayuda

Opciones de la aplicación:
  -h, --host=<host>                Connect to manager on host <host>
  -p, --port=<number>              Use port number <number>
  -V, --version                    Print version.
  -v, --verbose                    Verbose messages (WARNING: may reveal passwords).
  --use-certs                      Use client certificates to authenticate.
  --client-cert=<cert-file>        Client certificate. Default: /var/lib/openvas/CA/clientcert.pem
  --client-key=<key-file>          Client key. Default: /var/lib/openvas/private/CA/clientkey.pem
  --client-ca-cert=<cert-file>     Client CA certificate. Default: /var/lib/openvas/CA/cacert.pem
  -u, --username=<username>        OMP username
  -w, --password=<password>        OMP password
  --config-file=<config-file>      Configuration file for connection parameters.
  -P, --prompt                     Prompt to exit.
  -O, --get-omp-version            Print OMP version.
  -n, --name=<name>                Name for create-task.
  -C, --create-task                Create a task.
  -m, --comment=<name>             Comment for create-task.
  -c, --config=<config>            Config for create-task.
  -t, --target=<target>            Target for create-task.
  -E, --delete-report              Delete one or more reports.
  -D, --delete-task                Delete one or more tasks.
  -R, --get-report                 Get report of one task.
  -F, --get-report-formats         Get report formats. (OMP 2.0 only)
  -f, --format=<format>            Format for get-report.
  --filter=<string>                Filter string for get-report
  -G, --get-tasks                  Get status of one, many or all tasks.
  -g, --get-configs                Get configs.
  -T, --get-targets                Get targets.
  -i, --pretty-print               In combination with -X, pretty print the response.
  -S, --start-task                 Start one or more tasks.
  -M, --modify-task                Modify a task.
  --ping                           Ping OMP server
  --timeout=<number>               Wait <number> seconds for OMP ping response
  --file                           Add text in stdin as file on task.
  -X, --xml=<command>              XML command (e.g. "<help/>").  "-" to read from stdin.
  --send-file=<file>               Replace SENDFILE in xml with base64 of file.
  --details                        Enable detailed view.

[root@web2 init.d]#