/usr/bin/nsupdate: illegal option -- -
/usr/bin/nsupdate: invalid argument --
usage: nsupdate [-CdDi] [-L level] [-l] [-g | -o | -y keyname:secret | -k keyfile] [-p port] [ -S [-K tlskeyfile] [-E tlscertfile] [-A tlscafile] [-H tlshostname] [-O] ] [-v] [-V] [-P] [-T] [-4 | -6] [filename]