How are accounts managed in large *nix deployments?

Question

*nix-like systems

hello everyone
, please tell us by what means are account management issues resolved in large nix environments? Let's say there are 100 RH servers. Something tells me that there are some solutions (especially open source) that allow you to centralize work with accounts, get rid of shared accounts and set up role-based access. there are such?

Answer 1

www.tux.in.ua/articles/2969