> > Name one use of configuration files for local
> > permissions/ownership on Unix/Linux.
> 1. Start with /etc/passwd which determines ownership of the actual
> user accounts not just on Linux but on every UNIX compatible
> operating system I've seen. Add /etc/group and /etc/shadow (if
> applicable) to that.
That maps names (that you use to log in) to real Unix identity. No
permissions here.
> 2. Have a look at /etc/securetty which determines the ownership of
> terminals that the superuser can log into.
Nope, it lists terminals on which the superuser is allowed to log in. No
permissions given. Taken away, yes. In a way.
> 3. Have a look at /etc/hosts.{allow,deny,equiv} which determine
> which hosts have permission to access your system.
Non-local accesses here.
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