-e, --echo
       treat each ARG as an input line

-i, --input-range=LO-HI
       treat each number LO through HI as an input line

-n, --head-count=COUNT
       output at most COUNT lines

-o, --output=FILE
       write result to FILE instead of standard output

--random-source=FILE
       get random bytes from FILE

-z, --zero-terminated
       end lines with 0 byte, not newline

--help display this help and exit

--version
       output version information and exit