ApachePAMunixAuth
$ sudo yum install mod_auth_pam.x86_64 mod_auth_shadow.x86
http://pam.sourceforge.net/mod_auth_pam/shadow.html
Add to <Directory> or <Location>
AuthPAM_Enabled on
AuthShadow on
AuthType "basic"
AuthName "Auth"
require user drew
#require group blabla
Find safe work around
chmod 440 /etc/passwd
(orig 400)