Create SSH Keys

Generate key pairs

$ ssh-keygen -t ed25519 -C "[e-mail]"

You can choose another algorithms such as

$ ssh-keygen -t rsa -b 4096
$ ssh-keygen -t ecdsa -b 521

To validate key pairs

After adding your public keys, you validate it for example github

$ ssh -T [e-mail]

Note

• For Windows user, make sure your ssh-agent is running.

• You can open Windows PowerShell and check it by command below.

Get-Service ssh-agent

• If it is not running you can set it at Services App

Adding multiple account

$ nano ~/.ssh/config

• added information of your account

Host github.com
	HostName github.com
	User git
	IdentityFile ~/.ssh/id_rsa_account1

Host github.com-account2
	HostName github.com
	User git
	IdentityFile ~/.ssh/id_rsa_account2

• You can test and establish the connection through

$ ssh -T [e-mail]-account2

• For account1, you can use as normal or as your main account

• For account2, remember to replace "github.com" with "github.com-account2", for example

$ git clone [e-mail]-account2:<your_username>/<your_repo>.git

References

1. https://docs.github.com/en/github/authenticating-to-github/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account

2. https://docs.microsoft.com/en-us/windows-server/administration/openssh/openssh_keymanagement