使用expect实现ssh免密码登陆

Posted 2021-01-30 haona_li

使用expect向ip列表文件中的ip主机，执行ssh-copy-id命令复制密钥，以实现ssh免密登陆。

安装expect

yum install -y expect

生成密钥对

ssh-keygen -t rsa -P ‘‘ -f ~/.ssh/id_rsa

脚本

//shell脚本内容
# -------------------------
vim ssh-copy-id.sh

#!/bin/bash
#
[ $# -gt 0 -a -f "$1" ] || exit 1

cat $1 | while read ip ;do
    user=‘root‘
    password=‘centos‘

    expect ./ssh-copy-id.exp $ip $user $password
done




//expect脚本内容
-------------------------
vim ssh-copy-id.exp

#!/usr/bin/expect
set ip [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
set timeout 10
spawn ssh-copy-id [email protected]$ip
expect {
    "yes/no" { send "yes
";exp_continue }
    "password" { send "$password
" }
}
expect eof



//iplists文件
-------------------------
vim iplists.txt

192.168.10.101
192.168.10.102
192.168.10.103
192.168.10.104
192.168.10.105



//调用脚本
sh ssh-copy-id.sh iplists.txt