[root@master sbin]# start-dfs.sh

Starting namenodes on [master]

master: Error: JAVA_HOME is not set and could not be found.

The authenticity of host 'localhost (::1)' can't be established.

ECDSA key fingerprint is e8:5a:7d:5c:e3:f7:57:4a:96:c2:65:d6:e9:39:d0:7d.

Are you sure you want to continue connecting (yes/no)? yes

localhost: Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.

localhost: Error: JAVA_HOME is not set and could not be found.

Starting secondary namenodes [0.0.0.0]

The authenticity of host '0.0.0.0 (0.0.0.0)' can't be established.

ECDSA key fingerprint is e8:5a:7d:5c:e3:f7:57:4a:96:c2:65:d6:e9:39:d0:7d.

Are you sure you want to continue connecting (yes/no)? ^C0.0.0.0: Host key verification failed.