by Nezar Assawiel

Creating a key pair using Amazon EC2 Importing your own public key to Amazon EC2 Tagging a Key Pair Retrieving the public key for your key pair on Linux Retrieving the public key for your key pair on Windows Retrieving the public key for your key pair from your instance Verifying your key pair's fingerprint Deleting your key pair Adding or replacing a key pair for your instance Connecting to. If you enable the interactive serial console on an instance, anyone from any IP address is able to connect if they know the SSH key, username, project ID, zone, and instance name. Note: You can also configure your instance's metadata by clicking the Edit button for your instance on the VM instance page. Install Cloud SDK for your platform. This would initialize your local environment. First time you'll try to access instance via gcloud SSH/SCP functionality, Cloud SDK will generate a key locally as /.ssh/googlecomputeengine and inject your user and public SSH key into project-level metadata.

Google Cloud offers many tools and services. One of these services is creating highly customizable virtual machines. If you are not familiar with what a virtual machine is, here is a definition from Microsoft:

A virtual machine is a computer file, typically called an image, that behaves like an actual computer. In other words, creating a computer within a computer. It runs in a window, much like any other program, giving the end user the same experience on a virtual machine as they would have on the host operating system itself. The virtual machine is sandboxed from the rest of the system, meaning that the software inside a virtual machine can’t escape or tamper with the computer itself.

Virtual machines are needed in many situations to test applications against other operating systems, to access virus-infected data, or to experiment with other operating systems. You can install virtual machines on your computer. You can also create them in the cloud and simply connect to them.

In this tutorial, I will walk you through how to create a virtual machine in Google Cloud. We can connect to it with SSH from your computer.

  1. If you don’t have one already, create a Google Cloud account from here.

You will get $300 credit to play around with for a year! It is more than enough to learn and play with everything Google Cloud offers.

2.Create a new project or use an existing one. You can create a new project called project1, for example, as in the following gif:

3. Now you are set to create a virtual machine. Go to the top left corner of your Google Cloud home page, click on the triple bar icon ≡ and select Compute Engine ->VM instance and click Create.

Enter whatever name you want in the Name field as shown below:

Keep the default region and zone. Any region/zone will do for this tutorial. If you are curious about what they mean, you can read Google Cloud’s documentation about them here.

You can keep default machine type or click Customize toselect the number of CPU cores, memory, and GPUs you would like your virtual machine to have. You will see the cost on the right side changes!

For your first experiments with Google Cloud, you can be conservative with the $300 credit for some actual work. In such a case, you can choose the following configuration:

Next choose a boot disk. For example, you can choose 20 GB, SSD, Ubuntu 16.04 LTS as shown below:

Then set the Service Account under Identity and API access to No service account as shown below:

Finally, go to the Security tab under Firewall. You will see an SSH Key field as shown below:

This where you are going to connect your computer to the virtual machine using your SSH Key!

If you are not familiar with SSH (Secure Shell) and why you may want to use it, it is a network protocol that provides encrypted data communication between two computers (your computer and Google’s servers, in this case) which are connected over an insecure network (the Internet here).

Generation

To establish an SSH connection, you may need an application that can do that, depending on your operating system. Follow the rest of this post depending on your operating system (Windows or Mac/Linux).

Windows

I recommend PuTTY. It is an open-source and easy to use SSH client. You can download PuTTY and install it from here.

Generate random minio access key and secret key. Stripexcept IOError:SECRETKEY = os. Get( 'DJANGOSECRETKEY').

After installing PuTTY, open PuTTY Key Generator and click create. It will generate a random key by you moving the mouse over the blank area. After it is done, you will get something like this:

Change the key comment field to something recognizable and easy to type, as this will become a user name later!

Then save both the public and private keys by clicking the corresponding icons shown in the picture above.

Highlight the whole Key field from the PuTTY Key Generator, and copy and paste it in the key data field in Google Cloud:

Click create and wait for the virtual machine instance to be created.

In the meantime, you can go to PuTTY. Go to SSH ->Auth and browse for the private key file that you saved.

Next, go to Google Cloud and copy the external IP from the virtual machine instance that you just created as shown below:

And paste it on the Host field under Sessions in PuTTY and hit Enter:

Note: you might get an error message. Ignore it and click yes. (It just says the key is not already in the registry. Are you sure you want to connect?)

Oct 02, 2015  Router(config)# crypto key generate rsa general-keys The name for the keys will be: myrouter.example.com Choose the size of the key modulus in the range of 360 to 2048 for your General Purpose Keys. Choosing a key modulus greater than 512 may take a few minutes. That generates a 2048-bit RSA key pair, encrypts them with a password you provide and writes them to a file. You need to next extract the public key file. You will use this, for instance, on your web server to encrypt content so that it can only be read with the private key. May 27, 2010  Linux Generate RSA SSH Keys last updated May 27, 2010 in Categories Linux. H ow do I generate ssh RSA keys under Linux operating systems? You need to use the ssh-keygen command as follows to generate RSA keys (open terminal and type the following command): ssh-keygen -t rsa OR. Online rsa key generator.

Then enter the username you created when generating the key (key comment above). Boom! you are in the virtual machine that you just created.

You can install python and Google APIs on it, for example, to start making some magic! Don’t forget to shut it down in Google Cloud after you are done to be economic with your credit :)

Mac/Linux

Mac and Linux support SSH connection natively. You just need to generate an SSH key pair (public key/private key) to connect securely to the virtual machine.

The private key is equivalent to a password. Thus, it is kept private, residing on your computer, and should not be shared with any entity. The public key is shared with the computer or server to which you want to establish the connection. To generate the SSH key pair to connect securely to the virtual machine, follow these steps:

Enter the following command in Terminal: ssh-keygen -t rsa . It will start the key generation process. You will be prompted to choose the location to store the SSH key pair. Press ENTER to accept the default location as shown below:

Next, choose a password for your login to the virtual machine or hit ENTER if you wish not to use a password. The private key (i.e. identification) and the public key will be generated as shown below:

Now run the following command: cat ~/.ssh/id_rsa.pub . It will display the public key in the terminal as shown below. Highlight and copy this key:

and paste it in the SSH key field in Google Cloud and hit Create:

Now you can use the External IP of the virtual machine you just created:

to ssh to it as follows:

You will get “The authenticity of host…etc.” warning as shown in the picture below. This is normal. Whenever SSH connects to a system it hasn’t seen before, it will generate a warning like this. Reply yes to connect, and bingo!You are in the virtual machine, as you can see from host name instance-3. To exit the virtual machine, just type exit.

Don’t forget to shut the virtual machine in Google Cloud after you are done to save that $300 credit!

Originally published at assawiel.com/blog on December 23, 2017. Updated: Oct 10, 2018

I need to set and test my web-app using Google cloud compute engine. How do I connect to an Instance Using ssh on Ubuntu Linux or Apple OS X based system?
By default, you can always connect to an instance using ssh. This is useful so you can manage and configure your instances beyond the basic configuration enabled by gcutil or the REST API. The easiest way to ssh into an instance is to use gcutil command from your local Linux / OS X based systems. The following steps are required
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  1. Install gcutil/google sdk
  2. Authorize instance
  3. Verify instance status
  4. Create ssh keys
  5. Connect using gcutil or ssh client

Step #1: Install gcutil

gcutil runs on UNIX-based operating systems such as Linux and Mac OS X. To use gcutil, you must have Python 2.6.x or 2.7.x installed on your computer. gcutil does not support Python 3.x. Python is installed by default on most Linux distributions and Mac OS X. Open the Terminal and type the following command or to grab gcutil tool visiting this url.

Debian / Ubuntu / RHEL / CentOS Linux/OS X UNIX user type the following commands:

Open a terminal and type:
## Download IT ##
$ wget https://dl.google.com/dl/cloudsdk/release/google-cloud-sdk.tar.gz
$ tar -zxvf google-cloud-sdk.tar.gz
## INSTALL IT ##
$ bash google-cloud-sdk/install.sh
Sample outputs:

See how to install gcutil tool to manage Google Compute Engine on Linux / Unix for more information.

Step #2: Authenticating to Google Compute Engine

The syntax is:

If your project id is “apache-cluster”, enter:

Sample outputs:
Open a web browser, and go to the specified URL. Click the Grant Access link. The page will display an authorization code. Copy this code. Paste the authorization code into the waiting gcutil auth terminal and press enter. Type the following command to cache project-id:

Step #3: Verify instance status

Type the following command:
$ gcloud compute instances list
Sample outputs:

Note: instance-1 instance running in asia-east1-c zone.

Step #4: Create ssh keys

The syntax is:

In this example, connect to db1 instance using ssh:
$ gcloud compute ssh db1

Google Cloud Ssh Key Generation For Your Instance Free

gcutil creates local files to store your public and private key, and copies your public key to the project. By default, gcutil stores ssh keys in the following files on your local system:

  • $HOME/.ssh/google_compute_engine – Your private key
  • $HOME/.ssh/google_compute_engine.pub – Your public key

Google Cloud Ssh Key Generation For Your Instance Mac

Step #5: Connect using gcutil or ssh client

The syntax is:

OR

In this example, connect to the ‘instance-1’ instance using gcloud tool:

Sample outputs:

In this example, connect to the db1 (public ip 1.2.3.4) instance using ssh command:

Ssh Key Generation Aix

Sample sessions:

To SSH into ‘db3’ in zone asia-east1-c, run:
gcloud compute ssh db3 --zone asia-east1-c

You can also run a command on the virtual machine. For example, to get a snapshot of the guest’s process tree, run:
gcloud compute ssh db3 --zone asia-east1-c --command 'ps -ejH'

If you are using the Google container virtual machine image, you can SSH into one of your containers with:
gcloud compute ssh db3 --zone asia-east1-c --container CONTAINER

How do I login as root user?

For security reasons, the standard Google do not provide the ability to ssh in directly as root. The instance creator and any users that were added using the –authorized_ssh_keys flag or the metadata sshKeys value are automatically administrators to the account, with the ability to run sudo without requiring a password. Type the following command to switch to root user:

Sample session:

Google Cloud Ssh Key Generation For Your Instance Windows 10

Optional: Update your gcloud tools

Type the following command:

Google Cloud Ssh Key Generation For Your Instance List

Sample outputs:

References:
  • $HOME/.bash_profile file example.
  • Google Compute Engine documentation.
  • Man pages: bash(1)

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