用ssh-keygen创建公钥(每台服务器都需要执行)
su - hpcuser ##以普通用户hpcuser
ssh-keygen -t rsa
cat /home/hpcuser/.ssh/id_rsa.pub >> /home/hpcuser/.ssh/authorized_keys ##加入授权
chmod 600 /home/hpcuser/.ssh/authorized_keys # 修改文件权限
ssh-copy-id -i /home/hpcuser/.ssh/id_rsa.pub hpcuser@node1 #每台机器都传一边
