shell 指令碼 if then else fi

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echo "Please y to continue"
read yn
if [ "$yn" = "y" ] || [ "$yn" = "Y" ]; then
        echo "script is running..."
else
        echo "stop!"
fi 

注意有空格哦------------------------------------------

if [ "$1" = "hello" ] ; then
        echo "hello!"
elif [ "$1" = ""  ]; then
        echo " no parameter"
else
        echo "only hello "
fi

                              
[dev@abtsvr shellTest]$ sh test6.sh
 no parameter
[dev@abtsvr shellTest]$ sh test6.sh hhh
only hello
[dev@abtsvr shellTest]$ sh test6.sh hello
hello!

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