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28 .\" @(#)uname.1 8.3 (Berkeley) 4/8/94
31 .Dd Novermber 13, 2020
36 .Nd display information about the system
43 command writes the name of the operating system implementation to
45 When options are specified, strings representing one or more system
46 characteristics are written to standard output.
48 The options are as follows:
49 .Bl -tag -width indent
51 Behave as though the options
57 Write the kernel's linker-generated build-id to standard output.
59 Write the kernel ident to standard output.
63 version of the kernel.
65 Write the type of the current hardware platform to standard output.
72 Write the name of the system to standard output.
74 This is a synonym for the
76 option, for compatibility with other systems.
78 Write the type of the machine processor architecture to standard output.
85 Write the current release level of the operating system
88 Write the name of the operating system implementation to standard output.
92 version of the user environment.
94 Write the version level of this release of the operating system
100 flag is specified, or multiple flags are specified, all
101 output is written on a single line, separated by spaces.
107 flags are intended to be used for fine grain differentiation of incremental
109 development and user visible changes.
110 Note that when both of these two options are specified, regardless of their
111 order, the kernel version would be printed first, followed by the user
114 An environment variable composed of the string
116 followed by any flag to the
120 will allow the corresponding data to be set to the contents
121 of the environment variable.
124 for more information.
128 The hardware platform
130 can be different from the machine's processor architecture
132 e.g., on 64-bit PowerPC,
141 .Xr feature_present 3 ,
149 command is expected to conform to the
155 command appeared in PWB UNIX 1.0, however
157 was the first Berkeley release with the
165 extension flags appeared in
169 extension flag appeared in