-a, --all
       print all information, in the following order, except omit -p and -i if unknown:

-s, --kernel-name
       print the kernel name

-n, --nodename
       print the network node hostname

-r, --kernel-release
       print the kernel release

-v, --kernel-version
       print the kernel version

-m, --machine
       print the machine hardware name

-p, --processor
       print the processor type or "unknown"

-i, --hardware-platform
       print the hardware platform or "unknown"

-o, --operating-system
       print the operating system

--help display this help and exit

--version
       output version information and exit