Hadoop localhost: frankxulei@localhost: Permission denied (publicke...-优快云博客

本文介绍了在启动Hadoop HDFS时遇到权限不足错误的具体情况，并提供了详细的解决步骤。通过复制和导入公钥来配置SSH公钥认证，最终成功启动HDFS。

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Hadoop启动HDFS进程的时候报错，提示权限不够，具体信息如图所示：
localhost: frankxulei@localhost: Permission denied (publickey,password).

frankxulei@ubuntu:/usr/local/hadoop$ sbin/start-all.sh
WARNING: Attempting to start all Apache Hadoop daemons as frankxulei in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
localhost: frankxulei@localhost: Permission denied (publickey,password).
Starting datanodes
localhost: frankxulei@localhost: Permission denied (publickey,password).
Starting secondary namenodes [ubuntu]
ubuntu: frankxulei@ubuntu: Permission denied (publickey,password).
Starting resourcemanager
Starting nodemanagers
localhost: frankxulei@localhost: Permission denied (publickey,password).
frankxulei@ubuntu:/usr/local/hadoop$
解决办法，复制导入公钥就可以了，SSH链接需要使用公钥认证：

切换到ssh目录：cd ~/.ssh/

ssh-keygen -t rsa -P ""
cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys

再次启动HDFS就可以了，
sbin/start-dfs.sh