Using Multiple Githup Accounts on One Computer

I am writing for the Windows operating system, but the logic should work for other operating systems as well. With 5 simple steps we will be able to switch between accounts whenever we want.

Generate SSH keys for all accounts
Adding SSH keys to SSH Agent
Adding SSH public keys to Githup
Creating setting file and preparing Host inputs
Using different accounts when copying Githup repos

Generating SSH Keys for all accounts

For Windows, you need to be in the user folder. But we don't need to worry about that since we will use the Git Bash command line. We can get things done using Unix code.

C:\Users\__SENIN_KULLANICI_ADIN__\

Open Git Bash and type the following codes in order.

cd ~
mkdir .ssh
# If the folder already exists, the above will give an error. If it already exists, we will use that folder.
cd .ssh
eval `ssh-agent -s`

Create ssh keys for each account in the relevant folder using the following code.

ssh-keygen -t rsa -C "__MAIL_ADDRESS__" -f "__GITHUP_USER_NAME__"

The -C key here is for comments to help with identification. -f is the name of the file where the key will be saved.

The mail address you write here should be the non-emailable mail address that githup defines for us. It is not mandatory, but it is better not to use our main mail address in any git process to avoid confusion.

After adding the keys, there should be a private and a public file for each account in the .ssh folder.

The public key will have the extension .pub and the private key will not have an extension. Both will have the same name as the one after -f.

Once you have created a key for each of your accounts, you can continue.

Adding SSH Keys to SSH Agent

While still in .ssh on the command line, you can add the switches to the agent with the following command.

ssh-add __GITHUP_USER_NAME__
ssh-add __GITHUP_USER_NAME__

Adding SSH Public Key to Githup

Open the resulting .pub files with any text editor and copy the contents.

https://github.com/settings/keys by going to Add from New SSH key. You can write whatever you want in Title.

Creating and preparing a Config File

Go to Bash and enter the command touch config.
The above code will create a file named config in that folder without extension. Open that file with any text editor and paste the following into it.

	#__GITHUP_USER_NAME__ account
	Host github.com-__GITHUP_USER_NAME__
		HostName github.com
		User git
		IdentityFile ~/.ssh/__GITHUP_USER_NAME__
 
	#__GITHUP_USER_NAME2__ account
	Host github.com-__GITHUP_USER_NAME2__
		HostName github.com
		User git
		IdentityFile ~/.ssh/__GITHUP_USER_NAME2__

Edit the username parts to suit you. You can increase the number as much as you want.

Cloning Githup Repos Using Different Accounts

You can clone with the command below or you can clone directly over HTTPS.

git clone git@github.com-{__GITHUP_USER_NAME__}:{__REPO_OWNER_USER_NAME__}/{__REPO_NAME__}.git

You need to set user settings for each repo separately to determine which account will be used for commits. Global settings can only be used for a single account. Always do the following for all your existing repos and any repos you clone in the future.

     git config user.email "__GITHUP_MAIL_ADRESI__"
     git config user.name "__GITHUP_USER_NAME__"
 
     git config user.email "__GITHUP_MAIL_ADRESI_2__"
     git config user.name "__GITHUP_USER_NAME2__"

Of course you can increase the number.

Finally, we need to add remote origin to be able to use pull and push. Run the following command for each repon.

git remote add origin git@github.com-__GITHUP_USER_NAME__:__GITHUP_USER_NAME__
 
git remote add origin git@github.com-__GITHUP_USER_NAME2__:__GITHUP_USER_NAME2__

Source: https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent

Taken from UCH Wiki. https://wiki.ulascemh.com/doku.php?id=en:cs:git:multipleaccount

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