ddns-confgen: invalid argument -- Usage: ddns-confgen [-a alg] [-k keyname] [-r randomfile] [-q] [-s name | -z zone] -a alg: algorithm (default hmac-sha256) -k keyname: name of the key as it will be used in named.conf -r randomfile: source of random data (use "keyboard" for key timing) -s name: domain name to be updated using the created key -z zone: name of the zone as it will be used in named.conf -q: quiet mode: print the key, with no explanatory text

ddns-confgen: invalid argument -- Usage: ddns-confgen [-a alg] [-k keyname] [-r randomfile] [-q] [-s name | -z zone] -a alg: algorithm (default hmac-sha256) -k keyname: name of the key as it will be used in named.conf -r randomfile: source of random data (use "keyboard" for key timing) -s name: domain name to be updated using the created key -z zone: name of the zone as it will be used in named.conf -q: quiet mode: print the key, with no explanatory text