The authenticity of host can't be established

[#1]

Hello beautiful people,

I have installed virtualbox on my MacBook and following some of the questions here I realized that my machine doesn't show welcoming message after installation but it runs. However when I try :

ssh root@127.0.0.1 -p 2222

I get this:

The authenticity of host '[127.0.0.1]:2222 ([127.0.0.1]:2222)' can't be established

RSA key fingerprint is SHA256:0igBYD9432edfr23fesdxYa2l0sdasdasLUXyg.
Are you sure you want to continue connecting (yes/no)?

After I choose yes it goes this way:

Warning: Permanently added '[127.0.0.1]:2222' (RSA) to the list of known hosts.

root@127.0.0.1's password: 

You are required to change your password immediately (root enforced)

Changing password for root.

(current) UNIX password: 

Now I got lost because I am not sure if am doing it right. When I open this http://localhost:8080/ I get the ambari Ui but I cannot login using (root, my password), and also when I open http://localhost:4200/ shell opens in the browser and when I give my username root and password it requests my unix password and then connection closed and things gets back to square one.

I would really appreciate any help, point me to the right direction.

[#2]

@Faris Hassan

You can do SSH using port 2222 as following with password as "hadoop" (current default password)

# ssh root@127.0.0.1 -p 2222
Enter Password:  hadoop

Or use the Web Browser:

http://127.0.0.1:4200
Username: root
Password: hadoop

.

For Ambari the default credentials as "admin" (username) and "admin" (password)

http://localhost:8080/

.

[#3]

@Faris Hassan

If it still fails then please try this:

1. On your Local Laptop open the "known_hosts" file and remove the entry of "[127.0.0.1]:2222" and then same the "known_hosts" file and then try to do SSH to Virtual Box again:

Example: (on My Mac)

# cat ~/.ssh/known_hosts | grep 2222

.

if you find any entry for 127.0.0.1 on port 2222 then remove that entry and then try to d the SSH to Virtualbox (Sandbox) again as mentioned above. Using default root password "hadoop"

[#4]

I have followed the same instructions, I face the problem I face above. Ambari Ui Unable to sign in. Invalid username/password combination.

Browser-based shell gives me this message:

The authenticity of host '127.0.0.1 (127.0.0.1)' can't be established.                                                
RSA key fingerprint is 9c:3a:83:80:2c:d5:1f:a9:41:48:68:96:4d:0f:bb:ed.                                               
Are you sure you want to continue connecting (yes/no)?

[#5]

@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