Explain how to set path

README.md

@@ -12,6 +12,21 @@ This module requires Augeas.
 
     postfix::config { "relay_domains": value  => "localhost host.foo.com" }
 
+## Exec paths
+
+In order to not have any path problem, you should add the following line in
+some globally included .pp file:
+
+    Exec {
+      path => '/some/relevant/path:/some/other:...',
+    }
+
+For example:
+
+    Exec {
+      path => '/bin:/sbin:/usr/sbin:/usr/bin',
+    }
+
 ## Classes
 
 ### postfix