uname
Developer(s)AT&T Bell Laboratories, David MacKenzie.
Operating systemUnix and Unix-like
PlatformCross-platform
TypeCommand
Licensecoreutils: GPL-3.0-or-later

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.

History

The uname system call and command appeared for the first time in PWB/UNIX. Both are specified by POSIX.[1][2] The GNU version of uname is included in the "sh-utils" or "coreutils" packages. uname itself is not available as a standalone program. The version of uname bundled in GNU coreutils was written by David MacKenzie.[3] The command is available as a separate package for Microsoft Windows as part of the GnuWin32 project[4] and the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities.[5]

  • 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 bash shell provides the special variables OSTYPE and HOSTTYPE whose values are similar to those of uname -o and uname -m respectively.

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.[6]

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)
Arch Linux Linux GNU/Linux x86_64 Un­known Un­known #1 SMP PREEMPT_DYNAMIC Tue, 04 Oct 2022 19:16:52 +0000 6.0.0-arch1-1
A/UX 3.1 A/UX illegal option mc68030 illegal option illegal option SVR2 3.1
busybox-w32 1.27 (32-bit) on Windows 10 Windows_NT MS/Windows i686 Un­known Un­known 9200 6.2
busybox-w32 1.27 (64-bit) on Wine 2.0 Windows_NT MS/Windows x86_64 Un­known Un­known 3790 5.2
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:#FFC7C7;vertical-align:middle;text-align:center;" class="table-no"|illegal option CRAY Y-MP style="background:#FFC7C7;vertical-align:middle;text-align:center;" class="table-no"|illegal option style="background:#FFC7C7;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:#FFC7C7;vertical-align:middle;text-align:center;" class="table-no"|illegal option i686 style="background:#FFC7C7;vertical-align:middle;text-align:center;" class="table-no"|illegal option style="background:#FFC7C7;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
GNU Hurd GNU GNU i686-AT386 unknown unknown GNU-Mach 1.8+git20190109-486/Hurd-0.9 0.9
IBM AIX PS/2 v1.3 AIX illegal option i386 illegal option illegal option 1 3.0
IBM AIX 5.3 AIX illegal option (serial number of machine) powerpc IBM,8205-E6B 5 3
IBM AIX 7.1 AIX illegal option (serial number of machine) powerpc IBM,7891-73X 7 1
IBM AIX 7.2 AIX illegal option (serial number of machine) powerpc IBM,9009-42A 7 2
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
Interix, Subsystem for Unix-based Applications (SUA), AMD64 6.1 (Windows 2008 R2) Interix - genuineintel Intel64_Family_6_Model_26_Stepping_4 - 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
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
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
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
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
macOS Sierra 10.12 build 16E195, MacBookPro12,1 (Early 2015) Darwin illegal option x86_64 i386 illegal option Darwin Kernel Version 16.5.0: Fri Mar 3 16:52:33 PST 2017; root:xnu-3789.51.2~3/RELEASE_X86_64 16.5.0
macOS High Sierra 10.13.3 build 17D47, MacBookPro12,1 (Early 2015) Darwin illegal option x86_64 i386 illegal option Darwin Kernel Version 17.4.0: Sun Dec 17 09:19:54 PST 2017; root:xnu-4570.41.2~1/RELEASE_X86_64 17.4.0
macOS Mojave 10.14.3 build 18D109 Darwin illegal option x86_64 i386 illegal option Darwin Kernel Version 18.2.0: Thu Dec 20 20:46:53 PST 2018; root:xnu-4903.241.1~1/RELEASE_X86_64 18.2.0
macOS Catalina 10.15.5 build 19F101 Darwin Darwin x86_64 i386 MacBookPro15.1 Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64 19.5.0
macOS Big Sur 11.0.1 build 20B29 on Apple M1 Darwin illegal option arm64 arm illegal option Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:10 PDT 2020; root:xnu-7195.50.7~2/RELEASE_ARM64_T8101 20.1.0
macOS Monterey 12.2.1 build 21D62[7] on Apple M1 Darwin illegal option arm64 arm illegal option Darwin Kernel Version 21.3.0: Wed Jan 5 21:37:58 PST 2022; root:xnu-8019.80.24~20/RELEASE_ARM64_T8101 21.3.0
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
MidnightBSD 1.0, Intel MidnightBSD MidnightBSD amd64 amd64 [kernel name from kernel conf file. i.e.: GENERIC] MidnightBSD 1.0 #5 r11989M: Sat Aug 11 13:20:45 EDT 2018 root@stargazer.midnightbsd.org:/usr/obj/usr/src/sys/GENERIC 1.0
MINIX 3.1.7, x86 Minix illegal option i686 i386 illegal option 1.7 3
MinGW 32 bit (Windows 7) MINGW32_NT-6.1 Msys i686 Un­known Un­known 2018-11-26 09:22 2.11.2(0.329/5/3)
MinGW 64 bit (Windows 7) MINGW64_NT-6.1 Msys x86_64 Un­known Un­known 2018-11-26 09:22 2.11.2(0.329/5/3)
MSYS 32 bit (Windows 7) MSYS_NT-6.1 Msys i686 Un­known Un­known 2018-11-26 09:22 2.11.2(0.329/5/3)
MSYS 64 bit (Windows 7) MSYS_NT-6.1 Msys x86_64 Un­known Un­known 2018-11-26 09:22 2.11.2(0.329/5/3)
NetBSD NetBSD Un­known i386 i386 Un­known NetBSD 6.0.1 (GENERIC) 6.0.1
NonStop OS H06 25 NONSTOP_KERNEL Un­known NSE-T Un­known H06 25 Un­known
NonStop OS 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 2.5.1 Intel Platform Edition SunOS Solaris i86pc i386 i86pc Generic_103641-42 5.5.1
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
OpenIndiana Hipster 2018.04 SunOS Solaris i86pc i386 i86pc illumos-47b8d4b884 5.11
OpenIndiana Hipster 2021.10 SunOS illumos i86pc i386 i86pc illumos-b12aaafbf5 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
Ubuntu 20.0.4LTS on Raspberry Pi 4 Model B Linux GNU/Linux aarch64 aarch64 aarch64 #20-Ubuntu SMP Sun Sep 6 05:11:16 UTC 2020 5.4.0-1018-raspi
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 illegal option x86 illegal option 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
Windows Subsystem for Linux (WSL), Ubuntu 18.04 Linux GNU/Linux x86_64 x86_64 x86_64 #476-Microsoft Fri Nov 01 16:53:00 PST 2019 4.4.0-18362-Microsoft
Windows Subsystem for Linux (WSL2), Ubuntu 20.04 Linux GNU/Linux x86_64 x86_64 x86_64 #1 SMP Wed Aug 25 23:20:18 UTC 2021 5.10.60.1-microsoft-standard-WSL2

See also

Footnotes

  1. ↑ uname. The Open Group Base Specifications Issue 7/IEEE Std 1003.1, 2013 Edition. Specifies the command.
  2. ↑ uname. The Open Group Base Specifications Issue 7/IEEE Std 1003.1, 2013 Edition. Specifies the function/system call.
  3. ↑ uname(1) – Linux User Manual – User Commands
  4. ↑ CoreUtils for Windows
  5. ↑ Native Win32 ports of some GNU utilities
  6. ↑ 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.
  7. ↑ Find out which macOS your Mac is using
The Wikibook Guide to Unix has a page on the topic of: Commands
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