1.wget获取epel源

wget http://files.tttidc.com/centos6/epel-6.repo
mv epel-6.repo /etc/yum.repos.d/

SSH密钥的批量分发_centos

2.检查本地挂载情况，如果没挂载，须先挂载

挂载命令：mount /dev/sr0 /mnt  #挂在路径根据你们自己本地的yum源来挂载

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#清空缓存
yum clean all

#创建缓存
yum makecache

3.下载sshpass软件包

yum -y install sshpass

SSH密钥的批量分发_密钥对_03

4.创建密钥对文件

ssh-keygen -t dsa #指定dsa算法

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5.免交互方式发放公钥

sshpass -p "123456" ssh-copy-id -i /root/.ssh/id_dsa.pub -o StrictHostKeyChecking=no root@192.168.10.91

SSH密钥的批量分发_密钥对_06


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6.测试免密登录

ssh 192.168.10.91

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7.编写ssh密钥对免交户批量分发脚本

#!/bin/bash
#author:lixiang
#2021-09-13

#定义变量
user=root
password=123456

function YumBuild(){

echo "正在安装epel源yum仓库..."
cd /etc/yum.repos.d/
wget http://files.tttidc.com/centos6/epel-6.repo &>/dev/null
yum clean all &>/dev/null
yum makecache &>/dev/null

}

echo "测试主机ip是否能连接外网..."
ping www.baidu.com -c 2 >/dev/null || (echo "无法连接外网，请检查本地网络环境" && exit)

[ $# -eq 0 ] && echo "没有参数！格式为：sh $0 " && exit
YumBuild
if [ $? -gt 0 ];then
echo "epel源构建失败..." && exit
fi
rpm -q sshpass &>/dev/null || yum -y install sshpass &>/dev/null || (echo "sshpass build error!" && exit)
[ -d ~/.ssh ] || mkdir ~/.ssh
chmod 700 ~/.ssh
echo "正在创建密钥对..."
ssh-keygen -t dsa -P "" -f ~/.ssh/id_dsa &>/dev/null
for ip in $*
do
   ping $ip -c 2 &>/dev/null
   if [ $? -gt 0 ];then
   echo "$ip无法ping通网络"
        continue
   fi
sshpass -p "$password" ssh-copy-id -i ~/.ssh/id_dsa.pub -o StrictHostKeyChecking=no ${user}@$ip &>/dev/null
echo "$ip 公钥分发成功"
done

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8.测试公钥发放

chmod u+x ssh.sh #赋予执行权限
./ssh.sh 192.168.10.92 192.168.10.93 192.168.10.94 192.168.10.95 192.168.10.96

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