uname

uname (short for unix name) is a computer program in Unix and Unix-like computer operating systems that prints the name, version and other details about the current machine and the operating system running on it. The uname system call and command appeared for the first time in PWB/UNIX. Both are specified by POSIX.^[1]^[2]

Some Unix variants, such as AT&T UNIX System V Release 3.0, include the related setname program, used to change the values that uname reports.

The GNU version of uname is included in the "sh-utils" or "coreutils" packages. uname itself is not available as a standalone program.

Examples

On a system running Darwin, the output from running uname with the -a command line argument might look like the text below:

$ uname -a
Darwin Roadrunner.local 10.3.0 Darwin Kernel Version 10.3.0: Fri Feb 26 11:58:09 PST 2010; root:xnu-1504.3.12~1/RELEASE_I386 i386

The following table contains examples from various versions of uname on various platforms.^[3] Within the bash shell, the environment variable OSTYPE contains a value similar (but not identical) to the value of uname -o.

Distribution	System (or kernel) (-s) POSIX	Operating System (or distribution) (-o)	Machine (-m) POSIX	Processor (-p)	Hardware platform (-i or -M)	OS (kernel) version (-v) POSIX	OS (kernel) release (-r) POSIX
Android 4.2.1 on Nexus 4	Linux	GNU/Linux	armv7l	Unknown	Unknown	#1 SMP PREEMPT Thu Nov 8 15:42:02 PST 2012	3.4.0-perf-ge039dcb
Android 2.3 on Meteorit netbook	Linux	GNU/Linux	armv6l	Unknown	Unknown
any, coreutils 7.1	Linux	GNU/Linux	sparc64	sparc64	UltraSPARC T1 (Niagara)	(all)	(all)
any, coreutils 7.1–8.4	Linux	GNU/Linux	ppc64	ppc64	PPC 970FX (XServe G5)	(all)	(all)
CentOS 6.5, Pentium SU4100	Linux	GNU/Linux	i686	i686	i386	#1 SMP Fri Nov 22 00:26:36 UTC 2013	2.6.32-431.el6.i686
Cray UNICOS 9.0.2.2	sn5176	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	CRAY Y-MP	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	sin.0	9.0.2.2
Cygwin (Windows XP), Pentium 4	CYGWIN_NT-5.1	Cygwin	i686	unknown	unknown	2006-01-20 13:28	1.5.19(0.150/4/2)
Cygwin 1.7 (Windows 7 32-bit), Core i7	CYGWIN_NT-6.1	Cygwin	i686	unknown	unknown	2012-07-20 22:55	1.7.16(0.262/5/3)
Cygwin 1.7 (Windows 7 64-bit), Core i7	CYGWIN_NT-6.1-WOW64	Cygwin	i686	unknown	unknown	2012-05-09 10:25	1.7.15(0.260/5/3)
Cygwin 1.7 64 bit (Windows 7 64-bit)	CYGWIN_NT-6.1	Cygwin	x86_64	unknown	unknown	2014-02-09 21:06	1.7.28(0.271/5/3)
Cygwin 2.2 64 bit (Windows 10 64-bit)	CYGWIN_NT-10.0	Cygwin	x86_64	unknown	unknown	2015-08-20 11:42	2.2.1(0.289/5/3)
DJGPP v2 32 bit (Windows Server 2008)	MS-DOS	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	i686	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	50	5
Debian 6.0.5 on Raspberry Pi B	Linux	GNU/Linux	armv6l	Unknown	Unknown (-i) / invalid (-M)	#90 Wed Apr 18 18:23:05 BST 2012 / #538 PREEMPT Fri Aug 30 20:42:08 BST 2013	3.1.9+ / 3.6.11+
Debian on WD MyBookLive	Linux	GNU/Linux	ppc	Unknown	Unknown (-i) / invalid (-M)	#1 Fri Oct 15 17:13:23 PDT 2010	2.6.32.11-svn21605
Debian GNU/Hurd	GNU	GNU	i686-AT386	unknown	unknown (-i) / illegal option (-M)	GNU-Mach 1.3.99-486/Hurd-0.3	0.3
Debian GNU/kFreeBSD 6.0, AMD	GNU/kFreeBSD	GNU/kFreeBSD	x86_64	amd64	AMD Sempron(tm) Processor 3000+	#0 Thu Nov 26 04:22:59 CET 2009	8.0-1-amd64
DragonFlyBSD	DragonFly	illegal option	i386	i386	GENERIC	DragonFly v2.13.0.749.g93fef-DEVELOPMENT #0: …	2.13-DEVELOPMENT
DragonFlyBSD 2.7, AMD64	DragonFly	illegal option	x86_64	x86_64	[filename of kernel conf file]	DragonFly v2.7.3.122.g0ba92-DEVELOPMENT #0: Tue June 8 16:50:35 CEST 2010	2.7-DEVELOPMENT root@Chance.: /usr/obj/usr/src/sys/X86_64_GENERIC
Fedora 19	Linux	GNU/Linux	i686	i686	i386	#1 SMP Fri Mar 7 17:22:54 UTC 2014	3.13.6-100.fc19.i686
FreeBSD 6.1, Intel	FreeBSD	illegal option	i386	i386	[kernel name from kernel conf file. i.e.: GENERIC]	FreeBSD 6.1-RELEASE-p15 #1: Sun Apr 15 18:04:51 EDT 2007	6.1-RELEASE-p15
FreeBSD 9.0, Intel	FreeBSD	FreeBSD	amd64	amd64	[kernel name from kernel conf file. i.e.: GENERIC]	FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC	9.0-RELEASE
Gentoo, UltraSparc IIe	Linux	GNU/Linux	sparc64	sun4u	TI UltraSparc IIe (Hummingbird)	#1 SMP Wed Nov 10 02:04:26 CET 2010	2.6.34-gentoo-r12
Haiku R1/Alpha 1, QEMU	Haiku	Haiku	BePC	Unknown	Unknown	r33109 Sep 12 2009 17:45:45	1
HP-UX	HP-UX	illegal option	9000/712	illegal option	[Unique machine ID number or node name if cannot be determined.]	U	B.11.11
HP-UX 11i v3	HP-UX	illegal option	ia64	illegal option	[Unique machine ID number or node name if cannot be determined.]	U	B.11.31
IBM AIX 5.3	AIX	AIX	00C57D4D4C00	powerpc	IBM,8205-E6B	5	3
IBM AIX 7.1	AIX	illegal option	uniqe serial number	powerpc	IBM,7891-73X	7	1
IBM i 5.3 with QSH	OS400	(hostname)	(serial number of machine)	Unknown	Unknown	5	3
IBM i 6.1 with QSH	OS400	(hostname)	(serial number of machine)	Unknown	Unknown	6	1
IBM i 7.1 with QSH	OS400	(hostname)	(serial number of machine)	Unknown	Unknown	7	1
Interix (Windows Services for UNIX) 3.5	Interix	illegal option	x86	Intel_x86_Family6_Model28_Stepping10	illegal option	10.0.7063.0	6.1
IRIX	IRIX	illegal option	IP22	mips	illegal option
IRIX 6.5.30, Origin 2000	IRIX64	illegal option	IP30 IP35	mips	illegal option	07202013	6.5
Linux Mint 10 "Julia" 64-bit	Linux	GNU/Linux	x86_64	Unknown	Unknown	#33-Ubuntu SMP Sun Sep 19 20:32:27 UTC 2010	2.6.35-22-generic
Linux on Xeon Phi	Linux	GNU/Linux	k1om	k1om	k1om	#2 SMP Fri Jun 21 13:43:31 EDT 2013	2.6.38.8-g2593b11
Mac OS X Panther 10.3, PowerBook G4 (2004)	Darwin	illegal option	Power Macintosh	powerpc	illegal option	Darwin Kernel Version 7.8.0: Wed Dec 22 14:26:17 PST 2004; root:xnu/xnu-517.11.1.obj~1/RELEASE_PPC	7.8.0
Mac OS X Snow Leopard 10.6, MacBook3,1 (Late 2007)	Darwin	illegal option	i386	i386	illegal option	Darwin Kernel Version 10.0.0: Fri Jul 31 22:47:34 PDT 2009; root:xnu-1456.1.25~1/RELEASE_I386	10.0.0
Mac OS X Lion 10.7.3 build 11D50, MacbookPro7,1 (Late 2010)	Darwin	illegal option	x86_64	i386	illegal option	Darwin Kernel Version 11.3.0: Thu Jan 12 18:47:41 PST 2012; root:xnu-1699.24.23~1/RELEASE_X86_64	11.3.0
Mac OS X Mountain Lion 10.8.3 build 12D78, MacbookPro10,1 (Mid 2012)	Darwin	illegal option	x86_64	i386	illegal option	Darwin Kernel Version 12.3.0: Sun Jan 6 22:37:10 PST 2013; root:xnu-2050.22.13~1/RELEASE_X86_64	12.3.0
Mac OS X Mavericks 10.9 build 13A598, MacbookPro5,1 (Mid 2009)	Darwin	illegal option	x86_64	i386	illegal option	Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64	13.0.0
Mac OS X Yosemite 10.10 build 14A298i, MacbookPro6,2 (Mid 2010)	Darwin	illegal option	x86_64	i386	illegal option	Darwin Kernel Version 14.0.0: Tue Jul 15 23:56:31 PDT 2014; root:xnu-2782.1.43.0.2~1/RELEASE_X86_64	14.0.0
Mac OS X El Capitan 10.11 build 15A284, MacBookPro10,1 (Mid 2012)	Darwin	illegal option	x86_64	i386	illegal option	Darwin Kernel Version 15.0.0: Sat Sep 19 15:53:46 PDT 2015; root:xnu-3247.10.11~1/RELEASE_X86_64	15.0.0
Manjaro Linux 0.8.11 64 bit	Linux	GNU/Linux	x86_64	Unknown	Unknown	#1 SMP PREEMPT Sat Nov 15 10:54:42 UTC 2014	3.17.3-1-MANJARO
MINIX 3.1.7, x86	Minix	illegal option	i686	i386	illegal option	1.7	3
MinGW	MINGW32_NT-6.1	Msys	i686	Unknown	Unknown	2012-11-21 22:34	1.0.18(0.48/3/2)
MSYS	MSYS_NT-6.1	Msys	i686	Unknown	Unknown	2012-11-21 22:34	1.0.18(0.48/3/2)
NetBSD	NetBSD	Unknown	i386	i386	Unknown	NetBSD 6.0.1 (GENERIC)	6.0.1
NonStop H06 25	NONSTOP_KERNEL	Unknown	NSE-T	Unknown	H06	25	Unknown
NonStop J06 14	NONSTOP_KERNEL	Unknown	NSE-AB	Unknown	J06	14	Unknown
OpenBSD 5.4	OpenBSD	illegal option	amd64	amd64	illegal option	GENERIC.MP#1	5.4
openSUSE 10.3, Core2-duo 64-bit	Linux	GNU/Linux	x86_64	x86_64	x86_64	#1 SMP 2007/09/21 22:29:00 UTC	2.6.22.5-31-default
OpenWRT Barrier Breaker r40420 on TL-WR1043ND	Linux	GNU/Linux	mips	Unknown	Unknown (-i) / invalid (-M)	#1 Tue Apr 8 06:30:07 UTC 2014	3.10.34
QNX	QNX	–	x86pc	x86	–	2010/07/09-14:44:03EDT	6.5.0
Red Hat Linux, Fedora Core 6, AMD Turion64 mobile	Linux	GNU/Linux	i686	athlon	i386	#1 SMP Wed Jan 10 19:28:18 EST 2007	2.6.19-1.2895.fc6
ReliantUNIX	ReliantUNIX-Y		RM600	R4000		B2005	5.45
SINIX	SINIX-Y		RM600	R4000			5.43
Solaris 8	SunOS	illegal option	sun4u	sparc	SUNW,UltraAX-i2	Generic_117350-50	5.8
Solaris 9, Sun Fire 280R	SunOS	illegal option	sun4u	sparc	SUNW,Sun-Fire-280R	Generic_112233-08	5.9
Solaris 10, Sun Fire V490	SunOS	illegal option	sun4u	sparc	SUNW,Sun-Fire-V490	Generic_142900-13	5.10
Solaris 11.1, Sun Fire X4540	SunOS	illegal option	i86pc	i386	i86pc	11.1	5.11
OpenIndiana	SunOS	illegal option	i86pc	i386	i86pc	oi_151a8	5.11
SmartOS	SunOS	illegal option	i86pc	i386	i86pc	joyent_20150403T203811Z	5.11
OmniOS	SunOS	illegal option	i86pc	i386	i86pc	omnios-a708424	5.11
Tru64	OSF1	invalid	alpha	alpha	invalid	2650	V5.1
Ubuntu 11.04	Linux	GNU/Linux	x86_64	x86_64	x86_64	#46-Ubuntu SMP Tue Jun 28 15:07:17 UTC 2011	2.6.38-10-generic
Ubuntu 12.0.4 on Pandaboard ES	Linux	GNU/Linux	armv7l	armv7l	armv7l	#33-Ubuntu SMP PREEMPT Sat Jan 26 00:46:04 UTC 2013	3.2.0-1425-omap4
Ultrix	ULTRIX	–	VAX	–	–	0	4.5
Unity Linux	Linux	GNU/Linux	i686	Intel(R) Core(TM) i5-2520M CPU @ 2.50 GHz	Unknown (-i) / invalid (-M)	#1 SMP Fri Oct 1 16:46:58 UTC 2010	2.6.35.7-unity1
UnxUtils 2007 32 bit (Windows Server 2008)	WindowsNT	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	x86	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	style="background:#F99;vertical-align:middle;text-align:center;" class="table-no"\|illegal option	6	0
(SCO) OpenServer 5.0.6	SCO_SV	(hostname)	i386	i386	illegal	5.0.6	3.2
(SCO) System V	SCO_SV	illegal	i386	i386	illegal	6.0.0	5
(SCO) UnixWare 7.1.4	UnixWare	illegal option	i386	x86at	-i hardware serial/license number, .e.g. 1AB000123 or NUL000000; -M is illegal option	7.1.4	5
UWIN (64 bit Windows 7), Intel Core i5	UWIN-W7	UWIN	i686-64	x64	64/64	2012-06-26	5.0/6.1
SYS$UNIX:SH on OpenVMS on VAX emulator	IS/WB	illegal option	vax-6340	illegal option	illegal option	std	5.0
z/OS USS	OS/390	Unknown	2097	Unknown	-i/-M: unknown option; -I: z/OS	03	22.00

Footnotes

↑ uname. The Open Group Base Specifications Issue 7/IEEE Std 1003.1, 2013 Edition. Specifies the command.
↑ uname. The Open Group Base Specifications Issue 7/IEEE Std 1003.1, 2013 Edition. Specifies the function/system call.
↑ These are merely meant to broadly represent common systems; actual output may vary depending on hardware type, OS version, and which software patches have been installed.

External links

uname – Commands & Utilities Reference, The Single UNIX® Specification, Issue 7 from The Open Group
uname(1) – Linux User Commands Manual
uname(1) – FreeBSD General Commands Manual
uname(1) – Darwin and OS X General Commands Manual
uname(1) – Solaris 10 User Commands Reference Manual

Unix command-line interface programs and shell builtins

File system	cat chmod chown chgrp cksum cmp cp dd du df file fsck fuser ln ls mkdir mount mv pax pwd rm rmdir split tee touch type umask

Processes	at bg chroot cron fg kill killall nice pgrep pkill ps pstree time top

User environment	clear env exit finger history logname mesg passwd su sudo uptime talk tput uname w wall who whoami write

Text processing	awk banner basename comm csplit cut diff dirname ed ex fmt fold head iconv join less more nl paste printf sed sort spell strings tail tr uniq vi wc xargs yes

Shell builtins	alias cd echo test unset wait

Networking	dig host ifconfig inetd netcat netstat nslookup ping rdate rlogin route ssh traceroute

Searching	find grep locate whatis whereis

Documentation	apropos help man

Miscellaneous	bc dc cal expr lp od sleep true and false

List of Unix commands

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uname

Examples

See also

Footnotes

External links