xref: /freebsd/usr.bin/uname/uname.1 (revision 7aa383846770374466b1dcb2cefd71bde9acf463)
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32.\"	@(#)uname.1	8.3 (Berkeley) 4/8/94
33.\" $FreeBSD$
34.\"
35.Dd January 26, 2010
36.Dt UNAME 1
37.Os
38.Sh NAME
39.Nm uname
40.Nd display information about the system
41.Sh SYNOPSIS
42.Nm
43.Op Fl aimnoprsv
44.Sh DESCRIPTION
45The
46.Nm
47command writes the name of the operating system implementation to
48standard output.
49When options are specified, strings representing one or more system
50characteristics are written to standard output.
51.Pp
52The options are as follows:
53.Bl -tag -width indent
54.It Fl a
55Behave as though the options
56.Fl m , n , r , s ,
57and
58.Fl v
59were specified.
60.It Fl i
61Write the kernel ident to standard output.
62.It Fl m
63Write the type of the current hardware platform to standard output.
64.It Fl n
65Write the name of the system to standard output.
66.It Fl o
67This is a synonym for the
68.Fl s
69option, for compatibility with other systems.
70.It Fl p
71Write the type of the machine processor architecture to standard output.
72.It Fl r
73Write the current release level of the operating system
74to standard output.
75.It Fl s
76Write the name of the operating system implementation to standard output.
77.It Fl v
78Write the version level of this release of the operating system
79to standard output.
80.El
81.Pp
82If the
83.Fl a
84flag is specified, or multiple flags are specified, all
85output is written on a single line, separated by spaces.
86.Sh ENVIRONMENT
87An environment variable composed of the string
88.Ev UNAME_
89followed by any flag to the
90.Nm
91utility (except for
92.Fl a )
93will allow the corresponding data to be set to the contents
94of the environment variable.
95.Sh EXIT STATUS
96.Ex -std
97.Sh SEE ALSO
98.Xr sysctl 3 ,
99.Xr uname 3 ,
100.Xr sysctl 8
101.Sh STANDARDS
102The
103.Nm
104command is expected to conform to the
105.St -p1003.2
106specification.
107.Sh HISTORY
108The
109.Nm
110command appeared in PWB UNIX.
111