Hadoop集群搭建无密码登录

两台服务器，hadoop-001和hadoop-003

1.讲hadoop-001的公钥远程拷贝到hadoop-003

scp id_rsa.pub hadoop-003:/home/hadoop

 

2. 切换到hadoop-003，追加hadoop-001的公钥到authorized_keys中

cat ../id_rsa.pub >> ./authorized_keys

 

3. 从hadoop-001登录到hadoop-003（无需密码）

ssh hadoop-003

 

是不是感觉很麻烦，实际上有一个最快捷的方法

ssh-copy-id hadoop-0001