Bash figure out which OS we are running on

gistfile1.sh

# Figure out OS
osfamily='Unknown'
apt-get help > /dev/null 2>&1 && osfamily='Debian'
yum help help > /dev/null 2>&1 && osfamily='RedHat'
if [ "${OS}" == 'SunOS' ]; then osfamily='Solaris'; fi
if [ `echo "${OSTYPE}" | grep 'darwin'` ]; then osfamily='Darwin'; fi
if [ "${OSTYPE}" == 'cygwin' ]; then osfamily='Cygwin'; fi
echo "Detected OS based on: ${osfamily}"
        case ${osfamily} in
        "RedHat")
                # Redhat based
                sudo yum install puppet-server
        ;;
        "Debian")
                # Debian based
                sudo apt-get install puppet
        ;;
        "Darwin")
                # Mac based
                .........
        ;;
        "Solaris")
                # Solaris
                ..........
        ;;
        *)
                # Unknown, use generic method or exit?
                ..........
        ;;
        esac