I just launched one of the Ubuntu Server AMI's on Amazon EC2.
I connect just fine, but I don't see anything to tell me the default login credentials.
login as: ?
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On EC2 all the Ubuntu AMI's should be connected to like so:
$ ssh -i your-ssh-key.pem firstname.lastname@example.org
So you connect as the 'ubuntu' user using the ssh key you injected into the instance at launch (not a password). Once authenticated, you can issue password-less root commands with sudo.
(note: your ssh key might be .priv, or .pem, or no extension, this is just an example)
Here are also some handy resources about connecting to EC2 instances:
Launching an instance and choosing or creating a new SSH keypair: http://docs.amazonwebservices.com/AWSEC2/latest/GettingStartedGuide/index.html?LaunchInstance.html
Connecting with your ssh keypair: http://docs.amazonwebservices.com/AWSEC2/latest/GettingStartedGuide/index.html?ConnectToInstanceLinux.html
What they don't mention there is that you connect to Ubuntu instances with the 'ubuntu' account and not root.
I prefer to type
ssh ubuntu@host instead of
ssh -i your-ssh-key.pem ubuntu@host.
I wrote an article that describes how to do this:
Uploading Personal ssh Keys to Amazon EC2
If you're always logging in to EC2 hosts using
ubuntu you can even make that the default for when you use the standard EC2 instance public host name. This lets you just type
ssh hostname. To do this, edit
$HOME/.ssh/config and add a section like:
Host *.amazonaws.com User ubuntu
As a further option, if you don't want to use personal ssh keys (although probably the best solution) but want to simplify the command line, add your key to
~/.ssh/ and add the following to
Host ec2-xxx-xxx-xxx-xxx.xxxx.compute.amazonaws.com User ubuntu IdentityFile ~/.ssh/yourkey.pem
Then you can simply use
If you have your EC2 registered to a domain then you can also use the following:
Host yourdomain.com User ubuntu IdentityFile ~/.ssh/yourkey.pem
Then you can use
Finally, to simplify it without a domain, use an alias as follows:
Host myalias HostName ec2-xxx-xxx-xxx-xxx.xxxx.compute.amazonaws.com User ubuntu IdentityFile ~/.ssh/yourkey.pem
Then you can use
For community AMIs created by Bitnami, the username is 'bitnami'.
Here's the section in Bitnami's Quick Start Guide, for reference:
nologin script on the root user tells you (via
ssh -i pem.pem root@<private.ip.ec2.instance>) which user you should use instead.
In some AMI images that is
ssh -i pem.pem email@example.com
In ubuntu AMI images that is
Then in managed instances it's different again; EMR nodes have
YMMV therefore check with trying root.