cat /etc/os-release|head -n 1
NAME="Ubuntu"
Connection to node2 closed.
执行成功：node2
NAME="Ubuntu"
Connection to node3 closed.
执行成功：node3
NAME="Ubuntu"
Connection to node4 closed.
执行成功：node4
这样就实现了自动化创建密钥对+分发公钥+所有服务器软件环境安装+批量远程执行脚本mssh.sh，麻雀虽小，五脏俱全，绝对是干货！light weight baby！
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