两种shell交互的方法

while true; do 

 read -p "Do you wish to install this program?" yn 

 case $yn in 

 [Yy]* ) make install; break;; 

 [Nn]* ) exit;; 

 * ) echo "Please answer yes or no.";;
esac
done

echo "Do you wish to install this program?" 

select yn in "Yes" "No"; do 

    case $yn in 

 Yes ) make install; break;; 

 No ) exit;; 

 esac 

done