Hadoop僞分布式叢集在啟動時遇到Permission denied (publickey,gssapi-keyex,gssapi-with-mic

1.修改sshd_config檔案

vi /etc/ssh/sshd_config       //開啟以下内容

HostKey /etc/ssh/ssh_host_rsa_key
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile      .ssh/authorized_keys
           

重新開機sshd服務：systemctl restart sshd

2.建立密鑰

ssh-keygen -t rsa

cat id_rsa.pub >> authorized_keys

3.修改權限

chown -R hadoop:hadoop /home/hadoop

chmod 700 /home/hadoop

chmod 700 /home/hadoop/.ssh

chmod 644 /home/hadoop/.ssh/authorized_keys       //公鑰檔案的權限

chmod 600 /home/hadoop/.ssh/id_rsa             //私鑰檔案的權限