Shell Script to find the Operating System of the machine

For Linux you can type in the following bash command:

$ cat /etc/*-release

For Mac OS X you can try one of these commands:

$ sw_vers -productVersion $ system_profiler SPSoftwareDataType

Derived from other answers, this worked for me:

CURRENT_OS="OSX" #CENTOS, UBUNUTU are other valid optionsfunction findCurrentOSType(){    echo "Finding the current os type"    echo    osType=$(uname)    case "$osType" in            "Darwin")            {                echo "Running on Mac OSX."                CURRENT_OS="OSX"            } ;;                "Linux")            {                # If available, use LSB to identify distribution                if [ -f /etc/lsb-release -o -d /etc/lsb-release.d ]; then                    DISTRO=$(gawk -F= '/^NAME/{print $2}' /etc/os-release)                else                    DISTRO=$(ls -d /etc/[A-Za-z]*[_-][rv]e[lr]* | grep -v "lsb" | cut -d'/' -f3 | cut -d'-' -f1 | cut -d'_' -f1)                fi                CURRENT_OS=$(echo $DISTRO | tr 'a-z' 'A-Z')            } ;;            *)             {                echo "Unsupported OS, exiting"                exit            } ;;    esac}

use uname

$(uname -s)

this will give you the os name (Darwin = OSX)

$(uname -v)

will give you the os version

see uname manual here