1.cd ~/.ssh
2.生成秘钥:
可查看https://hadoop.apache.org/docs/r2.6.5/hadoop-project-dist/hadoop-common/SingleCluster.html
$ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
生成id_dsa.pub公钥
3.把公钥文件追加到一个验证文件中
cat id_dsa.pub >> authorized_keys
4.执行ssh localhost即可直接登录
注意点:
1.关闭防火墙
chkconfig iptables off
2.配置别名
vi /etc/hosts
192..168.88.31 node1
3.关闭安全机制
vi /etc/sysconfig/selinux
SELINUX=disabled