练习_while循环模拟跳板机

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#!/usr/bin/bash   #jumpserver trap "" HUP INT QUIT TSTP #捕捉异常退出 不执行任何操作 web1=192.168.201.130 web2=192.168.201.129 clear while : do     cat <<-EOF             +-------------------+             |       1.web1      |               |       2.web2      |             +-------------------+     EOF     echo -en "\e[1;32mplease input a number:  \e[0m"  #高亮显示 -e启用反斜杠转义解释 -n 不换行     read  num     case "$num" in     1)             ssh solider@web1             ;;     *)             echo "error"     esac done