while循环 case语句 的一个脚本
小脚本：执行效果 显示一个菜单 当输出菜单上给出的键后，执行相应的动作
即 当用户输出d 显示 show disk usages. 当然这也可以真的显示disk使用情况，只是加入的命令的不同，哈哈，，，这个是个人自己编写的，，看老师给出的题目。
# cat choice.sh
#!/bin/bash
echo "(d|D) shwo disk usages."
echo "(m|M) show memory usages."
echo "(s|S) show swap usages."
echo "(qQ) quit"
echo "(p) print this menu"
read -p "input options: " INSOME
while [ $INSOME != 'quit' ]; do
case $INSOME in
)
echo " show disk ussage"
read -p "input options: " INSOME;;
)
echo "show memory usage"
read -p "input options: " INSOME;;
)
echo "show swap usages"
read -p "input options: " INSOME;;
)
echo "quiting..."
exit 0;;
p)
echo "(d|D) shwo disk usages."
echo "(m|M) show memory usages."
echo "(s|S) show swap usages."
echo "(qQ) quit"
read -p "input options: " INSOME;;
*)
echo "Unknown character."
read -p "input options: " INSOME;;
esac
done
#
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