NAME
uname —
display information about the
system
SYNOPSIS
uname |
[-aiKmnoprsUv] |
DESCRIPTION
Theuname command writes the name of the operating
system implementation to standard output. When options are specified, strings
representing 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-vwere 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. (make(1) uses it to set the MACHINE variable.)
-n- Write the name of the system to standard output.
-o- This is a synonym for the
-soption, for compatibility with other systems. -p- Write the type of the machine processor architecture to standard output. (make(1) uses it to set the MACHINE_ARCH variable.)
-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.
EXAMPLES
The hardware platform (-m) can be
different from the machine's processor architecture
(-p), e.g., on 64-bit PowerPC,
-m would return powerpc and
-p would return powerpc64.
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.