-Pn: Treat all hosts as online -- skip host discovery
-n/-R: Never do DNS resolution/Always resolve [default: sometimes]
--open: Only show open (or possibly open) ports
-T<0-5>: Set timing template (higher is faster)
--min-hostgroup/max-hostgroup <size>: Parallel host scan group sizes
--min-parallelism/max-parallelism <numprobes>: Probe parallelization
--host-timeout <time>: Give up on target after this long
-v: Increase verbosity level (use -vv or more for greater effect)
-d: Increase debugging level (use -dd or more for greater effect)
-oN/-oX/-oS/-oG <file>: Output scan in normal, XML, s|<rIpt kIddi3, and Grepable format, respectively, to the given filename.
-iL inputfilename (Input from list)