ssh免密配置

#添加用户
useradd hadoop

#设置密码
passwd hadoop

#配置ssh
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 0600 ~/.ssh/authorized_keys
scp ~/.ssh/authorized_keys hadoop@nn-2:/home/hadoop/.ssh/

#测试
ssh hadoop@localhost
ssh hadoop@nn-1

来源：oschina

链接：https://my.oschina.net/dingyibo/blog/3162928