#!/bin/bash
os=$(lsb_release -rs)
echo "$os"
if [[ "$os" = "16.04" ]] ; then
    echo "g"
elif [[ "$os" = "14.04" ]] ; then
    echo "b"
else
    echo "c"
fi

#!/bin/bash
os=$(lsb_release -rs)
echo "$os"
case "$os" in
    "16.04") echo "g" ;;
    "14.04") echo "b" ;;
    *) echo "c" ;;
esac