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uname

summary

    This subchapter looks at uname, a UNIX (and Linux) command.

    uname returns some basic information about your system.

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uname

    This subchapter looks at uname, a UNIX (and Linux) command.

    uname is used to report system information.

    On a Linux machine you can find all of this same information in the appropriate files in the /proc filesystem, but uname utility may be easier and faster to use.

basic use

    Type the uname without any options to get the kernel name.

    $ uname
    Darwin

system

    Use the -s option to get the operating system name.

    $ uname -s
    Darwin

release info

    Use the -r option to get the operating system release information.

    $ uname -r
    9.8.0

operating system version

    Use the -v option to get the operating system version.

    $ uname -v
    Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC

machine

    Use the -m option to get the machine hardware name.

    $ uname -m
    Power Macintosh

    When running on an Intel (or compatiable) processor, you may also get an indication as to whether it is a 32-bit or 64-bit system.

    $ uname -m
    x86_64

processor

    Use the -p option to get the machine processor architecture type.

    $ uname -p
    powerpc

network node

    Use the -n option to get the network node host name (node name).

    $ uname -n
    local

    You can also use the hostname command to get the exact same answer.

all

    Use the -a option to get all of the information available from this command.

    $ uname -a
    Darwin admins-power-mac-g5.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:57:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_PPC Power Macintosh

nonstandard

    There are a few additional nonstandard options that may be available. Even if available, they may produce unknown as their output. because these are nonstandard options, you should avaoid using them in a script.

    Use the -i option to get hardware platform information.

    $ uname -i
    x86_64

    Use the -o option to get he operating system name.

    $ uname -o
    GNU/Linux

CentOS and Red hat Enterprise

    You ca find the distribution version number for CentOS or red hat Enterprise Linux with the following command:

    $ cat /etc/redhat-release
    CentOS release 5.4 (Final)

other

    On November 8, 2010, Ramesh Natarajan named this the number 37 most frequently used UNIX/Linux command at this web page 50 Most Frequently Used UNIX / Linux Commands (With Examples).

    In June 2009, Ken Milberg named this command as one of the Top 50 universal UNIX commands at this web page Top 50 Universal INIX commands. Note that this web page requires agreeing to be spammed before you can read it.

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