SSH 免密码认证登陆

检查是否已安装ssh

rpm -qa |grep ssh 

如未安装可以重新安装

yum install -y openssl openssh-server

修改配置 vim  /etc/ssh/sshd_config

PermitRootLogin，RSAAuthentication，PubkeyAuthentication开启以上三个参数

设置开机启动

systemctl start sshd.service

systemctl enable sshd.service

生成公钥，并拷贝公钥至另一台服务器，并输入密码。

ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub  >>~/.ssh/authorized_keys
chmod 0600 ~/.ssh/authorized_keys 

ssh-copy-id -i ~/.ssh/id_rsa.pub 10.0.1.5

测试ssh免密码登陆

OK，成功