我是hadoop新手，我通过以下步骤运行它：

ssh-keygen
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
ssh localhost
./start-all.sh

但我得到以下错误：

WARNING: Attempting to start all Apache Hadoop daemons as ... in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [localhost]
localhost: Permission denied (publickey,password).
Starting datanodes
localhost: Permission denied (publickey,password).
Starting secondary namenodes [karbasi]
karbasi: Permission denied (publickey,password).
Starting resourcemanager
Starting nodemanagers
localhost: Permission denied (publickey,password).

请帮我解决我的问题。