/usr/bin/iscsi-gen-initiatorname: illegal option -- -
Usage: iscsi-gen-initiatorname [OPTIONS] -- generate an iSCSI initiatorname
Where OPTIONS are from:
   -h          print usage and exit
   -f          overwrite existing InitiatorName, if any
   -p IQN-PRE  set prefix for generated IQN (default iqn.2016-04.com.open-iscsi)