Linux免密登录配置

1、在可免密登录的主机A生成密钥信息：

ssh-keygen  #使用 ssh-keygen 命令，一直按回车，就可以生成当前机器的公钥 id_rsa.pub

2、将密钥信息拷贝到远程主机B

scp /home/hisancc/.ssh/id_rsa.pub  hisancc@192.168.100.45:/home/hisancc/.ssh/id_rsa.pub.nn01

3、登录远程主机将A主机拷贝的公钥信息写到authorized_keys

cat /home/hisancc/.ssh/id_rsa.pub.nn01 >> /home/hisancc/.ssh/authorized_keys

4、修改远程主机权限

chmod 700 ~/.ssh

chmod 600 ~/.ssh/authorized_keys