AddKeysToAgent  yes
ServerAliveInterval 60
ForwardAgent yes

Host er
    HostName er.s.bcarlin.xyz
    User bcarlin
    IdentityFile ~/.ssh/bca-perso-worklaptop

Host yi
    HostName yi.s.bcarlin.xyz
    User bcarlin
    IdentityFile ~/.ssh/bca-perso-worklaptop

Host code.bcarlin.xyz
    IdentityFile ~/.ssh/bca-perso-worklaptop