diff -up Linux-PAM-1.1.6/modules/pam_limits/limits.conf.limits Linux-PAM-1.1.6/modules/pam_limits/limits.conf

--- Linux-PAM-1.1.6/modules/pam_limits/limits.conf.limits	2012-08-15 13:08:43.000000000 +0200

+++ Linux-PAM-1.1.6/modules/pam_limits/limits.conf	2013-03-14 16:43:37.615087671 +0100

@@ -1,5 +1,16 @@

 # /etc/security/limits.conf

 #

+#This file sets the resource limits for the users logged in via PAM.

+#It does not affect resource limits of the system services.

+#

+#Also note that configuration files in /etc/security/limits.d directory,

+#which are read in alphabetical order, override the settings in this

+#file in case the domain is the same or more specific.

+#That means for example that setting a limit for wildcard domain here

+#can be overriden with a wildcard setting in a config file in the

+#subdirectory, but a user specific setting here can be overriden only

+#with a user specific setting in the subdirectory.

+#

 #Each line describes a limit for a user in the form:

 #

 #<domain>        <type>  <item>  <value>