Detect different OS and Distros and run package install commands

install_pkg.sh

function install()
{
   echo "$1"
   package="$1"
   case `uname` in
     Linux )
        LINUX=1
        if type "yum" > /dev/null; then
            # install foobar here
            rpm -qa | grep -qw "$package" || yum install "$package" -y
        fi
        if type "apt-get" > /dev/null; then
           # install foobar here
           dpkg -l | grep -qw "$package" || apt-get install "$package" -y;
        fi
        ;;
     Darwin )
        DARWIN=1
        if type "brew" > /dev/null; then
            # install foobar here
           brew list | grep -qw "$package" || brew install "$package"
        fi
        ;;
     * )
        # Handle AmgiaOS, CPM, and modified cable modems here.
        ;;
   esac
}

for i in "$@"; do install "$i"; done

1. Download install_pkg.sh
2. chmod +x install_pkg.sh
3. ./install_pkg.sh stow vim