Print certain system information.
With no OPTION, same as -s.

Usage: uname [OPTION]...

Options:
  -a, --all               Behave as though all of the options -mnrsvo were specified.
  -A, --all-labeled       like -a, print all information but one item per line, labeled.
  -s, --kernel-name       print the kernel name.
  -n, --nodename          print the nodename (the nodename may be a name that the system is known by
                          to a communications network).
  -r, --kernel-release    print the operating system release.
  -v, --kernel-version    print the operating system version.
  -m, --machine           print the machine hardware name.
  -o, --operating-system  print the operating system name.
  -h, --help              Print help
  -V, --version           Print version