freebsd man page for uname

UNAME(1)						    BSD General Commands Manual 						  UNAME(1)

NAME
     uname -- display information about the system

SYNOPSIS
     uname [-aiKmnoprsUv]

DESCRIPTION
     The uname command writes the name of the operating system implementation to standard output.  When options are specified, strings represent-
     ing one or more system characteristics are written to standard output.

     The options are as follows:

     -a      Behave as though the options -m, -n, -r, -s, and -v were specified.

     -i      Write the kernel ident to standard output.

     -K      Write the FreeBSD version of the kernel.

     -m      Write the type of the current hardware platform to standard output.

     -n      Write the name of the system to standard output.

     -o      This is a synonym for the -s option, for compatibility with other systems.

     -p      Write the type of the machine processor architecture to standard output.

     -r      Write the current release level of the operating system to standard output.

     -s      Write the name of the operating system implementation to standard output.

     -U      Write the FreeBSD version of the user environment.

     -v      Write the version level of this release of the operating system to standard output.

     If the -a flag is specified, or multiple flags are specified, all output is written on a single line, separated by spaces.

     The -K and -U flags are intended to be used for fine grain differentiation of incremental FreeBSD development and user visible changes.

ENVIRONMENT
     An environment variable composed of the string UNAME_ followed by any flag to the uname utility (except for -a) will allow the corresponding
     data to be set to the contents of the environment variable.

EXIT STATUS
     The uname utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     feature_present(3), getosreldate(3), sysctl(3), uname(3), sysctl(8)

STANDARDS
     The uname command is expected to conform to the IEEE Std 1003.2 (``POSIX.2'') specification.

HISTORY
     The uname command appeared in PWB UNIX.

     The -K and -U extension flags appeared in FreeBSD 10.0.

BSD
								 November 20, 2013							       BSD