--- loncom/build/distprobe	2009/07/05 23:58:38	1.16
+++ loncom/build/distprobe	2011/07/21 21:28:29	1.20
@@ -2,7 +2,7 @@
 #
 # The LearningOnline Network with CAPA
 #
-# $Id: distprobe,v 1.16 2009/07/05 23:58:38 raeburn Exp $
+# $Id: distprobe,v 1.20 2011/07/21 21:28:29 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -53,10 +53,12 @@ if (-e '/etc/redhat-release') {
         $dist = 'rhes'.$1;
     } elsif ($versionstring =~ /Red Hat Enterprise Linux Server release (\d+)/) {
         $dist = 'rhes'.$1;
-    } elsif ($versionstring =~ /CentOS release (\d+)/) {
+    } elsif ($versionstring =~ /CentOS(?:| Linux) release (\d+)/) {
         $dist = 'centos'.$1;
-    } elsif ($versionstring =~ /Scientific Linux SL release ([\d\.]+) /) {
-        $dist = 'scientific'.$1;
+    } elsif ($versionstring =~ /Scientific Linux (?:SL )?release ([\d.]+) /) {
+        my $ver = $1;
+        $ver =~ s/\.\d+$//;
+        $dist = 'scientific'.$ver;
     } else {
         warn('Unable to interpret /etc/redhat-release '.
              'to determine system type');