How to setup multiple GitHub accounts on Ubuntu

Git is a crucial tool for version control in software development, enabling you to manage code changes across personal projects, open-source contributions, and collaborations within different organizations, making it essential to handle multiple Git user accounts effectively.

Connecting your local environment to your GitHub accounts

The concept is straightforward each GitHub account should have its own associated SSH key, which consists of a pair of public and private keys. The private key is stored locally on your machine, while the public key is added to your GitHub account. Therefore, the number of SSH keys you have corresponds to the number of GitHub accounts you use. For instance, with two GitHub accounts — a personal and a professional one — you’ll need two SSH keys (two private keys and two public keys).

Check existing SSH keys on your local machine

ls -al ~/.ssh

By default,

• id_rsa
• id_rsa.pub

Create new SHH keys

ssh-keygen


Output
Generating public/private rsa key pair.
Enter file in which to save the key (/your_home/.ssh/id_rsa):offic

for references

How to Set Up SSH Keys on Ubuntu 20.04 | DigitalOcean

Check Configuration File

Inside the .ssh folder, create a file named config.

# Company Github Account
Host companyGit
    HostName github.com
    IdentityFile ~/.ssh/office-key
    User git
    IdentitiesOnly yes
    AddKeysToAgent yes

# Personal Github Account
Host personalGit
    HostName github.com
    IdentityFile ~/.ssh/id_rsa
    User git
    IdentitiesOnly yes
    AddKeysToAgent yes

Creating a New Repository

#  For personal account
git remote add origin git@personalGit:personal-account-username/new-repo.git

# For company account
git remote add origin git@companyGit:company-account-username/new-repo.git

Cloning an Existing Repository

# For personal account
git clone git@personalGit:personal-account-username/existing-repo.git

# For company account
git clone git@companyGit:company-account-username/existing-repo.git

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