--- loncom/build/distprobe	2010/05/08 18:20:56	1.17
+++ loncom/build/distprobe	2011/07/21 21:28:29	1.20
@@ -2,7 +2,7 @@
 #
 # The LearningOnline Network with CAPA
 #
-# $Id: distprobe,v 1.17 2010/05/08 18:20:56 raeburn Exp $
+# $Id: distprobe,v 1.20 2011/07/21 21:28:29 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -53,9 +53,9 @@ 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.]+) /) {
+    } elsif ($versionstring =~ /Scientific Linux (?:SL )?release ([\d.]+) /) {
         my $ver = $1;
         $ver =~ s/\.\d+$//;
         $dist = 'scientific'.$ver;