How to setup multiple ssh keys for different github repos

Create key and add it to github

Create ssh key:

ssh-keygen -t ed25519 -C "your_email@example.com"

Add your key to agent:

ssh-add ~/.ssh/elvinguti_key

Add key to github.

Update config

Update ~/.ssh/config:

Host github.com
  HostName github.com
  IdentityFile ~/.ssh/my_work_key
  IdentitiesOnly yes

Host elvinguti.github.com
  HostName github.com
  User elvinguti
  IdentityFile ~/.ssh/elvinguti_key
  IdentitiesOnly yes

you might need to restart the ssh-agent:

eval $(ssh-agent -s)

Then you should be able to clone a repo or update the git remote url:

# URL Format: git@host_alias:user/repo_name.git

# Existing repo
git remote set-url origin git@elvinguti.github.com:elvinguti/elvingutidev.git`

# Clone repo
git clone origin git@elvinguti.github.com:elvinguti/elvingutidev.git