centos做免密登录
<p>CentOS 6.9 SSH配置用户免密码登录</p><p>1、 演示环境：</p>
<p>192.168.1.144：CentOS 6.9 x86_64</p>
<p>192.168.1.146：CentOS 7.4 x86_64</p>
<p>2、 演示目标：192.168.1.144通过密钥认证的方式免密码直接登录192.168.1.146</p>
<p>3、 192.168.1.144安装软件包，并首次连接192.168.1.146：</p>
<p># yum -y install openssh-clients</p>
<p># ssh root@192.168.1.146</p>
<p><img title="1.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937753.jpg" alt="wKiom1nLSAGAqwl7AADLlCeWrik441.jpg" width="600" height="132" border="0" hspace="0"> </p>
<p>4、 192.168.1.144生成密钥对：# ssh-keygen -t rsa -P "" -f "/root/.ssh/id_rsa"</p>
<p><img title="2.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937757.jpg" alt="wKioL1nLR8-i_pVMAAD6xJOUPYk629.jpg" width="530" height="381" border="0" hspace="0"></p>
<p>ssh-keygen命令常用选项：</p>
<ul>
<li>
<div>-t TYPE：指定密钥加密类型</div>
</li>
<li>
<div>-P PASSWORD：指定私钥加密的密码，建议为空</div>
</li>
<li>
<div>-f FILENAME：指定密钥保存位置</div>
</li>
</ul>
<p>5、 192.168.1.144将公钥复制至远程192.168.1.146对应用户的家目录：</p>
<p>复制前，远程192.168.1.146：</p>
<p><img title="3.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937751.jpg" alt="wKiom1nLSBeCJM0UAAAmTjp05bo499.jpg" width="360" height="36" border="0" hspace="0"></p>
<p># ssh-copy-id -i /root/.ssh/id_rsa.pub root@192.168.1.146</p>
<p><img title="4.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937754.jpg" alt="wKioL1nLR-HDO1k3AACId5CZQv4276.jpg" width="650" height="122" border="0" hspace="0"></p>
<p>复制后，远程192.168.1.146：</p>
<p><img title="5.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937752.jpg" alt="wKiom1nLSCrChGyDAAEAVb0tt34516.jpg" width="600" height="162" border="0" hspace="0"></p>
<p>6、 测试192.168.1.144远程免密登录192.168.1.146：# ssh root@192.168.1.146</p>
<p><img title="6.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937755.jpg" alt="wKioL1nLR_Tyt9XDAABAzsC3Ntc975.jpg" width="450" height="56" border="0" hspace="0"></p>
<p>7、 测试scp命令免密：# scp /etc/fstab root@192.168.1.146:/tmp/fstab.txt</p>
<p><img title="7.jpg" src="https://www.linuxidc.com/upload/2017_10/171002132937756.jpg" alt="wKiom1nLSD_DW0YYAAArIIBHxfo695.jpg" width="590" height="35" border="0" hspace="0"></p>
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<span style="margin-left: 10px; font-weight: bold;">作者：KeerDi —— <b style="color: red">北方的后生</b></span>
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<span style="margin-left: 10px; font-weight: bold;">出处：http://www.cnblogs.com/keerdi/</span>
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<span style="margin-left: 10px; font-weight: bold; color: red;">本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。</span>
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来源：https://www.cnblogs.com/123hll/p/11471005.html
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