Determine OS

The fastest and easiest way to determine an OS is using uname -s. Upon executing that command, you can evaluate the value and determine the system kernel architecture. Not all of them can distinguish between 32-bit or 64-bit.

Quick Script

#!/bin/dash

case "$(uname -s)" in

Linux)

        machine="Linux"

;;

Darwin)

        machine="MacOS"

;;

CYGWIN*)

        machine="Cygwin"

;;

MINGW32)

        machine="MinGW"

        arch="32-bit"

;;

MINGW64)

        machine="MinGW"

        arch="64-bit"

;;

Interix)

        machine="Interix"

;;

MSYS*)

        machine="Msys"

;;

MINGW32)

        machine="MinGW"

        arch="32-bit"

;;

GNU)

        machine="Debian HURD"

;;

GNU/kfreeBSD)

        machine="Debian kfreeBSD"

;;

FreeBSD)

        machine="FreeBSD"

;;

NetBSD)

        machine="NetBSD"

;;

DragonFly)

        machine="DragonFlyBSD"

;;

Haiku)

        machine="Haiku"

;;

NONSTOP_KERNEL)

        machine="NonStop"

;;

QNX)

        machine="QNX"

;;

ReliantUNIX-Y)

        machine="ReliantUNIX"

;;

SINIX-Y)

        machine="SINIX"

;;

OSF1)

        machine="Tru64"

;;

ULTRIX)

        machine="Ultrix"

;;

IRIX)

        machine="Irix"

        arch="32-bit"

;;

IRIX64)

        machine="Irix"

        arch="64-bit"

;;

MINIX)

        machine="Minix"

;;

SunOS)

        machine="Solaris"

;;

UWIN-W7)

        machine="UWIN"

;;

IS/WB)

        machine="OpenVMS"

;;

OS/390)

        machine="z/OS USS"

;;

SCO_SV)

        machine="OpenServer | System V"

;;

sn5176)

        machine="Cray"

;;

UnixWare)

        machine="UnixWare"

;;

AIX)

        machine="IBM AIX"

;;

OS400)

        machine="IBM i with QSH"

;;

HP-UX)

        machine="HP-UX"

;;

*)

        1>&2 echo "[ ERROR ] unknown operating system architecture."

        exit 1

;;

esac

That's all about the recipe for determining operating system architecture.

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