Ubuntu – Cant ssh a virtualbox instance – Permission denied, please try again

14.04permissionssshvirtualbox

Im using ubuntu and Im trying to create a ssh connection between my ubuntu desktop and virtualbox ubuntu instance.

I have my ubuntu virtualbox instante configured with bridge, and in my ubuntu desktop Im trying to connect to my virtualbox instance like this: sudo ssh nameofvminstance

I enter the correct password of my vbox instance, but Im having always the same message: "Permission denied, please try again".

Do you see why this can be happening?

Best Answer

Remove sudo, just do:

ssh nameofvminstance

then enter the password.

If you do sudo ssh nameofvminstance, then you are basically trying to log in to the host nameofvminstance as root, if thats the case then at first you need to enter the password of your account in the host computer to get the sudo access and then the password of the root account of nameofvminstance.

Now if you do ssh nameofvminstance, its basically a short form of ssh username@nameofvminstance where the username in the remote computer is the same as the currently logged in user of the host machine i.e. you can use this format if both usernames are same otherwise you need to mention the username as ssh username@nameofvminstance.

Related Solutions

Ubuntu – SSH error: Permission denied, please try again

You've locked the account.

From the manpage of usermod(8):

-L, --lock
           Lock a user's password. This puts a '!' in front of the encrypted password,
           effectively disabling the password.

Now look at your shadow line:

ubuntu:!$6$rWDSG...HSi1:15347:0:99999:7:::

Unlock it:

usermod -U ubuntu

Important note! If this user is preinstalled on the system it may be locked for a reason (security reasons), but I cannot decide that for you since this isn't a regular Ubuntu install apparently.

If the above makes you feel uncomfortable, you could create a separate user:

sudo adduser username

and answer the questions. You should be able to login just fine. Also make it able to become root (use sudo) by adding it to the sudo group:

sudo adduser username sudo

In case you need to switch to the ubuntu user on the command line, you'll have to use your elevated privileges, because you can't provide credentials for the same reason as why you can't log in using SSH. Now, log in using SSH as username, and run this to become ubuntu:

sudo su -l ubuntu

For security reasons I would not advise to use root to log in directly.

Ubuntu – SSH login using Ubuntu’s terminal – Permission denied (publickey)

Check .ssh folder permission (run ls -laR ~/.ssh):

.ssh folder should have 700, while private key 600 and the public one can have 644.

Moreover, you can have more information about the problem running ssh with full debug logs

ssh -vvv ...

Best Answer

Related Solutions

Ubuntu – SSH error: Permission denied, please try again

Ubuntu – SSH login using Ubuntu’s terminal – Permission denied (publickey)

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