@Faris Hassan Are you using HDP Sandbox or HDF Sandbox? Also have you tried adding the Hostname in your Macbook as described here and then tried using the SSH with the hostname like "sandbox.hortonworks.com"? Mac users: echo '{IP-Address} sandbox.hortonworks.com sandbox-hdp.hortonworks.com sandbox-hdf.hortonworks.com'| sudo tee -a /private/etc/hosts . Also are you getting this message even after removing the corresponding "127.0.0.1" entry from your "~/.ssh/known_hosts" file? Example: (on My Mac) # cat ~/.ssh/known_hosts | grep 2222 . Fr ambari admin password reset you can refer to the following Thread: https://community.hortonworks.com/questions/85419/reset-ambari-admin-password.html ... View more