[tjoff]

> I find one disadvantage of SSH key auth, in case of GitHub in particular, that SSH key grants access to all the repos independently on the organization, etc.

Doesn't the article fix exactly that?

[vindex10]

my concern is not the configuration of gitconfig, but keeping the "escalated" ssh keys on the shared machine

if I understood correctly, the article suggests the way how to choose ssh key among those already stored on the server