linux-----case的用法
#！/bin/bash
echo "enter 1"
echo "enter 2"
echo "enter 3"
read -t 30 -p "enter your choose:" num
case $num in
"1")
echo "your choose 1"
;;
"2")
echo "your choose 2"
;;
"3")
echo "your choose 3"
;;
*)
echo "error"
;;
esac
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