How to use multiple github accounts in a single system using SSH key in LINUX/UBUNTU

The majority of developers could find it necessary to operate many GitHub accounts on a single computer. On the same machine, for instance, you might run both your personal projects' GitHub account and the account for your organization.

It only takes a fairly straightforward combination of ssh and git setup to implement this. For users of LINUX/UNIX, follow the instructions below.

1. Open Terminal

2. Generating the SSH keys

Step-1: Write the following command: $ ssh-keygen

After that command it should look like this:

Step-2: Write your folder path as show below image:

In the below image I've written youraccount for the path, in that you can write any name as per your requirement (yourname_work).

Now for passphrase we need to put it empty for now.
Once you enter empty passphrase then next step is Enter same passphrase again in that we put empty passphrase again

Now, go to the .ssh folder.
Run the below command: cat youraccount.pub

Copy the key starting with ssh-rsa
Go to the your github account in the web browser and then go to the settings tabs as shown in the figure below.

Now go to the SSH and GPG key tab as show in below image:

Click on New SSH key button
You will be able to see the below screen:
1. name: (as per your wish)
2. key: paste the key which we've copied from the .ssh folder
Open the config file which is present in the .ssh folder in your preferred code editor.

The above mentioned steps lets you generate and configure an ssh key.
You can follow these same steps as mentioned above to generate more ssh keys and configure it accordingly to set multiple ssh keys in the very same system.
Copy the below code and paste it in the config file. Make changes in your host, hostname and identity file as per your requirement.

#First generated and configured account with ssh key
Host github.com-shyam_work
 HostName github.com
 IdentityFile ~/.ssh/shyam-work


 #Further generated and configured account with ssh key
 Host github.com-shyam_personal
  HostName github.com
  IdentityFile ~/.ssh/shyam-personal