• Raspberry Pi Initial Ssh Key Generation Free
• Raspberry Pi Initial Ssh Key Generation Windows
• Raspberry Pi Initial Ssh Key Generation 2

In this Raspberry Pi terminal sharing tutorial, we are going to show you how to utilize a software package called tmate so that you can share your terminal with other computers, even when you are behind a firewall.

While the Raspberry Pi comes with VNC which allows you to share your desktop with other computers, it does not come with any methods to just share access to the terminal. That can be an issue when you are running a headless system as VNC will not be of any use.

Our solution to this is to utilize a program designed to share the terminal. In our tutorials case, this is tmate.

This tmate application allows you to share access to the current terminal session with anyone you share the special key with regardless of if you are behind a firewall. Tmate works by relaying it through tmates own secure servers.

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Equipment List

Below are all the bits and pieces that I used for setting up Raspberry Pi terminal sharing.

Recommended

Raspberry Pi 2 or 3

Micro SD Card

Power Supply

Ethernet Cord (Recommended) or Wifi dongle

USB Keyboard

USB Mouse

HDMI Cord

Optional

Raspberry Pi Case

Installing tmate on Raspbian

1. Before we get started with installing tmate on our Raspberry Pi, we must first ensure our Raspberry Pi is entirely up to date. To do this type in the two commands below into the terminal.

2. Now it’s our turn to install tmate, luckily unlike some other distributions tmate is already available in the Raspbian package repository, this is simple as running the following command on your Raspberry Pi.

3. Before we go ahead and run tmate we must first generate some SSH keys, the reason for this is that tmate uses them to encrypt the connections.

To generate an SSH key for your Raspberry Pi simply run the following command within the terminal. This command will create an SSH key based on the RSA encryption method with a size of 4096 bits.

4. Now that we have generated an SSH key for our Raspberry Pi we can now proceed to run tmate. To run tmate, you just need to run the following command.

5. Upon running tmate, your SSH session should change, and you should see a clear session as we have shown below. You will also have a yellow bar that shows the current status of tmate.

As we have shown below, the initial connection should end up showing you a URL to utilize for the other computer to connect to the SSH session. We will show you over the page a couple of ways of utilizing it if you are unsure.

This URL should appear like ssh xxxxxxxxxxxxx@to2.tmate.io, where xxxxxxxxxxxxx is a random combination of letters and numbers. Copy the URL as you will need this later to connect to the tmate session.

6. Once you are finished with your tmate session, you can stop it by simply typing in “exit” and pressing the Enter key.

Utilizing tmate from anywhere

1. One of the easiest ways to connect to a tmate session is to make use of their web terminal. To do this just take the URL you grabbed from creating your tmate session. The URL should be something like that we have shown below.

2. From this URL you will want to take everything before the @ symbol. So you should end up with something like below, where the x’s are your unique session ID.

3. Now with your unique ID in hand, all you need to do is just go to https://tmate.io/t/ with your unique ID added to the end of it. So your URL should end up something like what we have shown below.

4. You should see something like below appear in your web browser upon a successful connection. If it appears, then you are ready to start utilizing your remote connection.

One extra note that we should mention, we highly recommend that you change the default password of the Pi user before proceeding with this, for simplicity sake we did not do this in our tutorial.

Utilizing tmate from a Linux system

1. Utilizing tmate from a Linux based system is probably the second most straightforward ways to use tmate but is likely more of a secure solution then tmate’s web-based terminal. You can also use Windows 10’s Linux subsystem to do this as well.

To begin with, we must first generate an SSH key for the local user that we plan on using to connect to our remote tmate session. Without it, tmate will refuse the connection.

Start off by opening up a new terminal on your device and type in the following command. This command will generate a public/private RSA key pair and will be used to help secure the connection with tmate. If you already have created this in the past, then skip this step.

2. With the key now generated all we need to do to connect to the tmate session is utilize that URL that we obtained in the first section of this tutorial.

On the Linux based system of your choice simply type in ssh followed by the URL as we have shown below. This command will immediately make the connection to your remote terminal session.

Utilizing tmate from a Windows system

Utilizing tmate from a Windows system is slightly more complicated as it currently does not have a built-in SSH client like Linux/Unix based systems. Now here you can use a program such as Putty or MobaXTerm.

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In this guide, we are going to be showing you how to connect to your remote terminal session by utilizing MobaXTerm as that is our current SSH client of choice.

1. Begin by opening up MobaXTerm on your computer and click the “Session” button.

2. On this screen select the “Shell” tab (1.), then just click the “Ok” button at the bottom of the screen. There is no need to make any changes to any options on this screen.

3. Now that we are in the local terminal we just need to enter the following command. Just type in ssh-keygen into the terminal (1.) and press Enter.

This command will generate the SSH keys that we need. After you have done that you need to click “Settings” (2.) and then go to “Configuration.”

4. Now that we are in the configuration screen, we need to go to the SSH tab (1.)

Within here make sure “User Internal SSH agent” is checked (2.)

Finally, click the “OK” button (3.)

5. With the SSH key now generated and the internal SSH agent enabled we can now go ahead and connect to our tmate session. You just need to copy and paste the URL created for you into the remote host textbox (1.)

The tmate URL should look something like “xxxxxxxxxxxxx@to2.tmate.io”

With the URL entered into the text box all you need to do is press the “OK” button (2.).

Hopefully, by the end of this tutorial, you will have tmate up and running on your Raspberry Pi and have an idea on how to utilize it on various operating systems.

If you have any issues with this Raspberry Pi terminal sharing tutorial or have any feedback feel free to drop a comment below.

The Raspberry Pi initial setup requires you to create populate the micro SD card with the raspbian operating system and then on the first boot you need to configure the Raspberry Pi networking to meet your requirements. There are many different paths to get to the required end result depending on how you want to initially access the Pi and your local network environment.

There is a new version of Raspbian, called stretch, which you need to use. All instructions on this wiki will assume Raspbian Stretch is being used. The image is available from here

Flashing the SD Card

There are 2 options for flashing the SD card.

NOOBS

One is using a boot environment called NOOBs (New Out Of the Box Software), which walks you through the options to setup the micro SD card. However, using NOOBS requires you to be working directly on the Pi, with it connected to a TV or monitor with an HDMI cable and have a USB keyboard and mouse attached. The process is described here. You should select to install the full version of Raspbian when offered the list of available operating systems. Once Raspbian boots you are ready to configure the networking and then performing the necessary updates, described below.

Raspbian

The other option is to directly flash Raspbian onto the micro-SD card, using a flashing application such as Etcher. Instructions for installing Raspbian to the micro-SD card can be found here, but be sure to install the full version with Desktop, not the lite version. Installing Raspbian to the micro-SD card can enable you to access the Raspberry Pi without needing a monitor, keyboard and mouse to be attached to the Pi. Details can be found in this video.

If installing Raspbian without a keyboard, mouse and monitor you need to create a file on the SD file after flashing it. You need to create an empty file in the root of the boot partition called ssh. This will automatically enable remote access via SSH, without this file SSH is disabled by default, so you will not be able to access to raspberry pi remotely. Once Etcher has flashed the SD card it will automatically be disconnected, so you need to remove and reinsert the SD card and ensure it is mounted on your computer.

To create the file open a terminal or command window and change the the directory where the boot partition of the SD card is located, then enter the command:
macOS : touch ssh
linux : touch ssh
windows : type NUL >> ssh

I find that a direct Ethernet cable connection between my laptop and the Raspberry Pi is the most reliable option. Note, Microsoft Windows users will need to install additional software to enable local name resolution between Windows and Raspbian. A terminal application is also needed on Windows, such as putty.

If you are not able to connect via an Ethernet cable it is possible to get your Raspberry Pi to automatically connect to a WiFi network, so long as the WiFi network doesn't require you to launch a browser to be able to authenticate to the network. To enable your Raspberry Pi to automatically connect to a WiFi network you need to create an additional file in the root of the boot partition of the SD card (same place as the ssh file). The file needs to be called wpa_supplicant.conf and should contain the following:

replacing YOUR_SSID and YOUR_PASSWORD with the appropriate details for the WiFi network the Pi should connect to. If the network is open, without a password, then omit the psk= line and set key_mgmt=NONE.

You can now eject the SD card and insert it into the Pi and connect power to the Pi.

The setup process requires you to be able to access the graphical user interface of the Raspberry Pi, so if you are not using an HDMI connected TV or monitor, then you should install a VNC application on your laptop to remotely access the graphical user interface of the Raspberry Pi. Details of VNC access can be found here.

First boot and system setup

When you first boot your pi you need to do some initial configuration. To do this you need to access a command line.

If working directly on the Pi with keyboard, mouse and monitor there is a GUI version of the configuration application available from the menu:
Selecting the link will open up the configuration tool:

If accessing remotely you need to establish a connection to the pi using ssh. On Windows you can use an application, such as putty. On Linux and MacOS you can use the terminal application and the ssh command. You need to connect using the following details:

• Host : raspberrypi.local
• Name : pi
• Password : raspberry

so in a terminal window on linux or MacOS the command is:
ssh pi@raspberrypi.local
you should then be promoted for the password, which is raspberry.

Raspberry Pi Initial Ssh Key Generation Free

When you have command line access to your pi you need to enter the command:
sudo raspi-config
then you should see the config utility:

Use the arrow keys to move between menu items and the tab key to jump between sections in the interface. The enter key selects the currently highlighted option.

In the configuration tool you need to:

• Change the password for the standard user pi. The default is raspberry, but you should change this to prevent unauthorised access to your raspberry pi.
• Change the hostname, if needed. The default is raspberrypi and you should change it if you are likely to run your pi on a network containing other Raspberry pis.
• Set the location details for timezone, locale, WiFi region and keyboard layout
• Set the VNC resolution, I advise this to be set to 1280x720 or higher.
• Enable the following interfaces: Camera, SSH, VNC, I2C

After the updates have been made you can quite the configuration tool and select to reboot the raspberry pi.

When you reconnect to the pi the hostname will be what you set in the configuration tool followed by .local and the password for the pi user will be what you set on the configuration tool. You should now be able to connect using VNC to get remote access to the graphical user interface.

WiFi connectivity

Unless you are going to use a wired Ethernet connection you will need to configure the Raspberry Pi to use WiFi. You can configure a wifi connection from the command line, instructions can be found here, but it is easier to use the graphical user interface. If not working directly on the pi then you will need to access the desktop remotely using VNC.

Raspberry Pi Initial Ssh Key Generation Windows

Simply click the WiFi icon at the top of the screen:
then select your network and provide the security information to connect to the network.

Raspberry Pi Initial Ssh Key Generation 2

Once your Raspberry Pi is online you are ready to update the preinstalled software