Why authconfig create -ac files

Miroslav Suchy msuchy at redhat.com
Sun Jan 12 13:17:20 UTC 2014

I just wonder why `authconfig` creates:
   /etc/pam.d/system-auth -> system-auth-ac
   /etc/pam.d/postlogin -> postlogin-ac
   /etc/pam.d/password-auth -> password-auth-ac

Why those links and why -ac suffix? Why it does not modify original 
files directly?
Is there some story behind?


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