--terse-version=type Terse version output format (default 3, or 2).
--help Print this page
--cmdhelp=cmd Print command help, "all" for all of them
+ --enghelp=engine Print ioengine help, or list available ioengines
+ --enghelp=engine,cmd Print help for an ioengine cmd
--showcmd Turn a job file into command line options
--readonly Turn on safety read-only checks, preventing
writes