shell脚本批量推送公钥

目的：新建管理机，为了实现批量管理主机,设置密匙登陆

原理：.通过密钥登陆，可以不用密码

操作过程：

1.生成密匙

ssh-keygen

2.查看密匙

ls   ~/.ssh/

有私匙id_rsa公匙id_rsa.pub

3.单个发送公匙

ssh-copy-id   -i ~/.ssh/id_rsa.pub   用户名@用户ip地址

例：ssh-copy-id   -i ~/.ssh/id_rsa.pub   root@192.168.1.100

4.批量推送公匙

先安装expect：yum  -y install expect

[root@localhost wang]# vim sshCopyId.sh
#!/bin/bash
for i in 192.168.100.{172..176} #定义i变量，逐个查看
do
password="jianchi"
/usr/bin/expect -c "
spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$i
expect {
\"*(yes/no)\" { send \"yes\r\";exp_continue }
\"*password\" { send \"$password\r\"; exp_continue }
}
expect eof"
done