Git

Using a Specific SSH Private Key When Using Git Command

Using ssh-agent

ssh-agent bash -c 'ssh-add ~/.ssh/id_rsa_other; git clone git@github.com:user/project.git'

ssh-agent bash -c 'ssh-add ~/.ssh/id_rsa_other; git pull'

Using SSH Config File

cat ~/.ssh/config

Host github-work
    HostName github.com
    IdentityFile ~/.ssh/id_rsa_work

Host github-personal
    HostName github.com
    IdentityFile ~/.ssh/id_rsa_personal

git clone git@github-work:user/project.git

git clone git@github-personal:user/project.git

Using core.sshCommand

Configuring core.sshCommand

git clone -c "core.sshCommand=ssh -i ~/.ssh/id_rsa_work" git@github.com:user/project.git

Persisting core.sshCommand on Repository Level

git config core.sshCommand "ssh -i ~/.ssh/id_rsa_other"

git config --get core.sshCommand

git pull