1uname(1) User Commands uname(1)
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6 uname - print name of current system
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9 uname [-aimnprsvX]
10 uname [-S system_name]
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16 The uname utility prints information about the current system on the
17 standard output. When options are specified, symbols representing one
18 or more system characteristics will be written to the standard output.
19 If no options are specified, uname prints the current operating sys‐
20 tem's name. The options print selected information returned by
21 uname(2), sysinfo(2), or both.
22
24 The following options are supported:
25 -a Prints basic information currently available from the
27 system.
28 -i Prints the name of the platform.
31 -m Prints the machine hardware name (class). Use of this
34 option is discouraged. Use uname -p instead. See
35 NOTES section below.
36 -n Prints the nodename (the nodename is the name by
39 which the system is known to a communications net‐
40 work).
41 -p Prints the current host's ISA or processor type.
44 -r Prints the operating system release level.
47 -s Prints the name of the operating system. This is the
50 default.
51 -S system_name The nodename may be changed by specifying a system
54 name argument. The system name argument is restricted
55 to SYS_NMLN characters. SYS_NMLN is an implementation
56 specific value defined in <sys/utsname.h>. Only the
57 super-user is allowed this capability. This change
58 does not persist across reboots of the system. Use
59 sys-unconfig(1M) to change a host's name permanently.
60 -v Prints the operating system version.
63 -X Prints expanded system information, one information
66 element per line, as expected by SCO UNIX. The dis‐
67 played information includes:
68 o system name, node, release, version,
70 machine, and number of CPUs.
71 o BusType, Serial, and Users (set to
73 "unknown" in Solaris)
74 o OEM# and Origin# (set to 0 and 1, respec‐
76 tively)
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80 Example 1 Printing the OS name and release level
81 The following command:
84 example% uname −sr
87 prints the operating system name and release level, separated by one
92 SPACE character.
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96 See environ(5) for descriptions of the following environment variables
97 that affect the execution of uname: LANG, LC_ALL, LC_CTYPE, LC_MES‐
98 SAGES, and NLSPATH.
99 SYSV3 This variable is used to override the default behavior of
101 uname. This is necessary to make it possible for some INTER‐
102 ACTIVE UNIX Systems and SCO UNIX programs and scripts to work
103 properly. Many scripts use uname to determine the SYSV3 type
104 or the version of the OS to ensure software is compatible
105 with that OS. Setting SYSV3 to an empty string will make
106 uname print the following default values:
107 nodename nodename 3.2 2 i386
109 The individual elements that uname displays can also be modi‐
112 fied by setting SYSV3 in the following format:
113 os,sysname,node,rel,ver,mach
115 os Operating system (IUS or SCO).
119 sysname System name.
122 node Nodename as displayed by the -n option.
125 rel Release level as displayed by the -r option.
128 ver Version number as displayed by the -v option.
131 mach Machine name as displayed by -m option.
134 Do not put spaces between the elements. If an element is
136 omitted, the current system value will be used.
137
140 The following exit values are returned:
141 0 Successful completion.
143 >0 An error occurred.
146
149 See attributes(5) for descriptions of the following attributes:
150 ┌─────────────────────────────┬─────────────────────────────┐
155 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
156 ├─────────────────────────────┼─────────────────────────────┤
157 │Availability │SUNWcsu │
158 ├─────────────────────────────┼─────────────────────────────┤
159 │Interface Stability │Standard │
160 └─────────────────────────────┴─────────────────────────────┘
161
163 arch(1), isalist(1), sys-unconfig(1M), sysinfo(2), uname(2), node‐
164 name(4), attributes(5), environ(5), standards(5)
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167 Independent software vendors (ISVs) and others who need to determine
168 detailed characteristics of the platform on which their software is
169 either being installed or executed should use the uname command.
170 To determine the operating system name and release level, use uname
173 -sr. To determine only the operating system release level, use uname
174 -r. Notice that operating system release levels are not guaranteed to
175 be in x.y format (such as 5.3, 5.4, 5.5, and so forth); future releases
176 could be in the x.y.z format (such as 5.3.1, 5.3.2, 5.4.1, and so
177 forth).
178 In SunOS 4.x releases, the arch(1) command was often used to obtain
181 information similar to that obtained by using the uname command. The
182 arch(1) command output "sun4" was often incorrectly interpreted to sig‐
183 nify a SunOS SPARC system. If hardware platform information is desired,
184 use uname -sp.
185 The arch -k and uname -m commands return equivalent values; however,
188 the use of either of these commands by third party programs is discour‐
189 aged, as is the use of the arch command in general. To determine the
190 machine's Instruction Set Architecture (ISA or processor type), use
191 uname with the -p option.
192SunOS 5.11 17 Sep 2003 uname(1)