--- doc/install/linux/install.pl	2014/06/30 03:36:07	1.30
+++ doc/install/linux/install.pl	2014/06/30 14:55:40	1.31
@@ -72,7 +72,7 @@ if (!open(LOG,">>loncapa_install.log"))
           &mt('Stopping execution.')."\n";
     exit;
 } else {
-    print LOG '$Id: install.pl,v 1.30 2014/06/30 03:36:07 raeburn Exp $'."\n";
+    print LOG '$Id: install.pl,v 1.31 2014/06/30 14:55:40 raeburn Exp $'."\n";
 }
 
 #
@@ -694,7 +694,7 @@ sub chkapache {
                 $configfile = "/etc/apache2/conf-available/loncapa";
             }
             if (-e $configfile) {
-                if (open(PIPE, "diff --brief $instdir/debian-ubuntu/loncapa /etc/apache2/sites-available/loncapa |")) {
+                if (open(PIPE, "diff --brief $instdir/debian-ubuntu/loncapa $configfile |")) {
                     my $diffres = <PIPE>;
                     close(PIPE);
                     chomp($diffres);