--- doc/loncapafiles/updatequery.piml	2002/05/13 02:24:44	1.6
+++ doc/loncapafiles/updatequery.piml	2019/02/08 08:40:09	1.84.2.2
@@ -1,7 +1,6 @@
 <!-- updatequery.piml -->
-<!-- Scott Harrison -->
 
-<!-- $Id: updatequery.piml,v 1.6 2002/05/13 02:24:44 harris41 Exp $ -->
+<!-- $Id: updatequery.piml,v 1.84.2.2 2019/02/08 08:40:09 raeburn Exp $ -->
 
 <!--
 
@@ -34,6 +33,8 @@ http://www.lon-capa.org/
 <target dist='default'>/</target>
 <perlscript mode='fg'>
 $|=1;
+use strict;
+
   print(&lt;&lt;END);
 
 
@@ -48,26 +49,112 @@ $|=1;
 *********************************************
 
 END
-sleep(3);
+#sleep(3);
 </perlscript>
 </file>
 <file>
-<target dist='default'>/home/httpd/lonUsers2/</target>
+<target dist='default'>loncom/hosts.tab</target>
+<perlscript mode='fg'>
+my $lonCluster;
+unless (-l "<TARGET />") {
+  print(&lt;&lt;END);
+
+===============================================================================
+Which cluster option would you like to have installed?
+IMPORTANT: to take advantage of the cluster options 1) and 3),
+you must contact loncapa\@loncapa.org.
+
+1) PRODUCTION - you want to eventually connect this machine to the
+                LON-CAPA content sharing network. This setting is for
+                schools, colleges, and universities, that currently
+                are running - or in the future will run - courses.
+2) STAND-ALONE - you want this machine to run in 'stand-alone' mode and
+                 not be connected to other LON-CAPA machines for now.
+3) DEVELOPMENT - you want to do software (not content!) development with
+                 this workstation and eventually link it with the
+                 workstations of other LON-CAPA software developers.
+4) RUNNING YOUR OWN CLUSTER - this machine is not in the standard LON-CAPA
+                 clusters and won't be in the future and you want the existing
+                 hosts.tab and domain.tab files to be left alone.
+                 (This choice is unlikely what you want to select.)
+END
+# Option number 26 will install rawhide_hosts.tab, but
+# the typical user does not want to be part of an intensive
+# machine test cluster.
+
+# get input
+# if valid then process, otherwise loop
+my $flag=0;
+while (!$flag) {
+  print "ENTER 1, 2, 3, or 4:\n";
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice==1) {
+    $lonCluster='production'; $flag=1;
+  }
+  elsif ($choice==2) {
+    $lonCluster='standalone'; $flag=1;
+  }
+  elsif ($choice==3) {
+    $lonCluster='development'; $flag=1;
+  }
+  elsif ($choice==4) {
+    $lonCluster='existing'; $flag=1;
+    foreach my $file ('hosts.tab','dns_hosts.tab',
+                      'domain.tab','dns_domain.tab') {
+        if (-e '/home/httpd/lonTabs/'.$file) {
+	    `cp /home/httpd/lonTabs/$file ../existing_$file`;
+        }
+        else {
+	    print &lt;&lt;END;
+There is no existing /home/httpd/lonTabs/$file
+END
+            die('');
+        }
+    }
+  }
+  elsif ($choice==26) {
+    $lonCluster='rawhide'; $flag=1;
+  }
+}
+}
+</perlscript>
+</file>
+<file>
+<target dist='default'>/home/httpd/lonTabs/hosts.tab</target>
 <perlscript mode='fg'>
 $|=1;
+my $domainDescription;
+my $domainTabExtras;
+my $primaryLibServer;
+my $protocol;
+my $intdom;
+my $desiredhostname;
+my @libservers = ();
 unless (-e "<TARGET />") {
   print(&lt;&lt;END);
            WELCOME TO LON-CAPA!
 
-If you have questions, please visit http://install.lon-capa.org
-or contact sharrison\@mail.lon-capa.org.
+If you have questions, please visit http://install.loncapa.org
+or contact helpdesk\@loncapa.org.
 
 ===============================================================================
-The following 4 values are needed to configure LON-CAPA:
+The following 8 values are needed to configure LON-CAPA:
 * Machine Role
-* Machine ID Name
-* LON-CAPA Domain Name, and
-* System Administration E-mail Address.
+* LON-CAPA Domain Name
+* LON-CAPA Machine ID Name
+* Server Administration E-mail Address
+* LON-CAPA Domain's Primary Library Server Machine ID
+* Web Server Protocol
+* Internet Domain Name of Your Institution
+* Hostname
+===============================================================================
+
+In addition, a Support E-mail Address can also be included. If
+an address is included then one of the options in the LON-CAPA 
+help menu will be a link to a form that a user will complete to
+request LON-CAPA help.  
+
 END
 
 open(OUT,'&gt;/tmp/loncapa_updatequery.out');
@@ -78,8 +165,8 @@ close(OUT);
 **** Machine Role ****
 Library server (recommended if first-time installation of LON-CAPA):
    Servers that are repositories of authoritative educational resources.
-   These servers also provide the construction space by which instructors
-   assemble their classroom online material.
+   These servers also provide the authoring spaces in which content
+   creators (e.g., faculty instructors) create their learning content.
 Access server:
    Servers that load-balance high-traffic delivery of educational resources
    over the world-wide web.
@@ -115,25 +202,131 @@ while (!$flag) {
 }
 
 # need to recommend a machine ID name (ipdomain.l.somenumber)
-my $hostname=`hostname`; chomp($hostname);
+my $hostname=`hostname -f`; chomp($hostname);
 my $ipdomain='';
 if ($hostname=~/([^\.]*)\.([^\.]*)$/) {
   $ipdomain=$1;
 }
-my $lonHostID;
+
+  print(&lt;&lt;END);
+
+**** Domain ****
+[This does NOT need to correspond to an internet address domain.
+ Please make this name short AND descriptive of your organization.
+ Domain names are close to impossible to change later!!!
+ Good examples might be "msu" or "bionet" or "vermontcc".
+ Bad examples are "physics" (too general)
+   or "michiganstateuniversity" (too long)
+   or "msuedu" (just make it "msu", or else make it msu.edu)
+   or "msuphysics" (only if there is a good reason to limit to department
+                    - we don't know of one)
+   or "mydomain" (what is that?)
+ Avoid multiple domains at the same institution, even if it means that you 
+ have to actually work together with your colleagues. You can still run
+ multiple library servers within the same domain.
+ If this domain is eventually going to be part of the main production
+ cluster, you MUST contact the LON-CAPA group at MSU (loncapa\@loncapa.org)
+ to have a domain name assigned, and then use it exactly as given. This is
+ also true for test installs that might eventually turn into production setups.
+ The short domain name needs to be unique, if your aim is to join a cluster 
+ containing existing domains. Stop now if you have not yet contacted the 
+ MSU LON-CAPA group.] 
+END
+
+# get domain name
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+my $lonDefDomain;
+while (!$flag) {
 if ($ipdomain) {
-  $lonHostID=$ipdomain.$r.int(1+rand(9)); # should be probably detect against
-                                          # the hosts.tab
+print(&lt;&lt;END);
+ENTER LONCAPA DOMAIN [$ipdomain]:
+END
+}
+else {
+  print(&lt;&lt;END);
+ENTER LONCAPA DOMAIN:
+END
+}
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  my $bad_domain_flag=0;
+  my @bad_domain_names=('res','raw','userfiles','priv','adm','uploaded',
+	'editupload');
+  foreach my $bad (@bad_domain_names) {
+    $bad_domain_flag=1 if $choice eq $bad;
+  }
+  if ($choice=~/capa/i) {
+     $bad_domain_flag=1;
+  }
+  if ($ipdomain and $choice=~/^\s*$/) {
+    $choice=$ipdomain;
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'lonDefDomain'."\t".$choice."\n");
+    close(OUT);
+    $lonDefDomain=$choice;
+    $flag=1;
+  } elsif (length($choice)>35) {
+    print "Name too long\n";
+  } elsif (length($choice)<2) {
+    print "Name too short\n";
+  } elsif ($bad_domain_flag) {
+    print "Invalid input ('$choice' conflicts with LON-CAPA namespace).\n";
+    print "Please try something different than '$choice'\n";
+  } elsif ($choice!~/\_/ and $choice=~/^[\w\-.]+$/) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'lonDefDomain'."\t".$choice."\n");
+    close(OUT);
+    $lonDefDomain=$choice;
+    $r='l';
+    $flag=1;
+  } else {
+    print "Invalid input (only alphanumeric characters, '-', and '.' supported).\n";
+  }
+}
+
+# get domain description
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+
+while (!$flag) {
+  print(&lt;&lt;END);
+
+**** Domain Description ****
+String describing the domain, to be shown to users.
+[Example, msu is Michigan State University]
+ENTER DOMAIN DESCRIPTION:
+END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice!~/:/) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'domainDescription'."\t".$choice."\n");
+    close(OUT);
+    $domainDescription=$choice;
+    $flag=1;
+  }
+  else {
+    print "Invalid input (no ':' allowed).\n";
+  }
+}
+
+my $lonHostID;
+if ($lonDefDomain) {
+  $lonHostID=$lonDefDomain.$r.int(1+rand(9)); # should be probably also detect
+                                              # against the hosts.tab
 }
 
   print(&lt;&lt;END);
 
 **** Machine ID Name ****
-[this does NOT need to correspond to internet address names;
+[This does NOT need to correspond to internet address names;
  this name MUST be unique to the whole LON-CAPA network;
- we recommend that you use a name based off of your institution;
- good examples: "msul1" or "bionetl1";
- bad examples: "loncapabox" or "studentsinside"]
+ we recommend that you use a name based off of your institution.
+ Good examples: "msul1" or "bioneta2".
+ Bad examples: "loncapabox" or "studentsinside".
+ Note that machine names are very hard to change later.]
 END
 # get machine name
 # accept if valid, if not valid, tell user and repeat
@@ -151,99 +344,265 @@ END
 }
   my $choice=&lt;&gt;;
   chomp($choice);
-  if ($lonHostID and $choice=~/^\s*$/) {
+  if ($choice=~/capa/i) {
+    print "Invalid input (names containing 'capa' are reserved).\n";
+  } elsif ($lonHostID and $choice=~/^\s*$/) {
     $choice=$lonHostID;
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
     print(OUT 'lonHostID'."\t".$choice."\n");
     close(OUT);
+    $lonHostID=$choice;
     $flag=1;
-  }
-  elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
+  } elsif (length($choice)>45) {
+    print "Name too long\n";
+  } elsif (length($choice)<4) {
+    print "Name too short\n";
+  } elsif ($choice!~/\_/ and $choice=~/^[\w\-.]+$/) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
     print(OUT 'lonHostID'."\t".$choice."\n");
     close(OUT);
+    $lonHostID=$choice;
     $flag=1;
-  }
-  else {
-    print "Invalid input (only alphanumeric characters supported).\n";
+  } else {
+    print "Invalid input (only alphanumeric characters, '-', and '.' supported).\n";
   }
 }
 
-  print(&lt;&lt;END);
+# get primary library server in domain
+if ($lonRole eq 'library') {
+    if (!grep/^\Q$lonHostID\E$/,@libservers) {
+        push(@libservers,$lonHostID);
+    } 
+    if (@libservers == 1) {
+        $primaryLibServer = $libservers[0];
+    }
+}
 
-**** Domain ****
-[this does NOT need to correspond to internet address domains,
- examples might be "msu" or "bionet" or "vermontcc"]
+$flag=0;
+while (!$flag) {
+  print(&lt;&lt;END);
+**** Domain's Primary Library Server ID ****
+This should be the LON-CAPA machine ID of a library server in your 
+domain.  If you only have a single library server in your domain, then
+the Primary Library server ID will be the machine ID of that server. 
+This server will be where domain data which are not associated with any
+specific home library server will be stored (e.g., configurations that
+apply to all nodes in the domain).
+END
+    if (defined($primaryLibServer)) {
+        print(&lt;&lt;END);
+ENTER DOMAIN'S PRIMARY LIBRARY SERVER ID [$primaryLibServer]:
+END
+    } elsif (@libservers > 0) {
+        print(&lt;&lt;END);
+ENTER DOMAIN'S PRIMARY LIBRARY SERVER ID [$libservers[0]]
+END
+    } else {
+        print (&lt;&lt;END);
+No library servers could be identified for this domain.  If you have already installed LON-CAPA on a different server (designated as a library server) in this domain, please enter the LONCAPA MACHINE ID of that server.  If not, you will need to install a LON-CAPA library server.  Enter the MACHINE ID of the server you plan to designate as a library server.
 END
+    }
 
-# get domain name
+    my $choice=&lt;&gt;;
+    chomp($choice);
+    if ($primaryLibServer and $choice=~/^\s*$/) {
+        $choice=$primaryLibServer;
+        open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+        print(OUT 'primaryLibServer'."\t".$choice."\n");
+        close(OUT);
+        $flag=1;
+    } elsif (length($choice)>35) {
+        print "Name too long\n";
+    } elsif (length($choice)<4) {
+        print "Name too short\n";
+    } elsif ($choice!~/\_/ and $choice=~/^[\w\-.]+$/) {
+        open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+        print(OUT 'primaryLibServer'."\t".$choice."\n");
+        close(OUT);
+        $primaryLibServer=$choice;
+        $flag=1;
+    } else {
+        print "Invalid input (only alphanumeric characters, '-', and '.' supported).\n";
+    }
+}
+
+
+# get admin e-mail address
 # accept if valid, if not valid, tell user and repeat
 $flag=0;
-my $lonDefDomain;
+my $lonAdmEMail;
 while (!$flag) {
-if ($ipdomain) {
-print(&lt;&lt;END);
-ENTER LONCAPA DOMAIN [$ipdomain]:
+  print(&lt;&lt;END);
+
+**** Server Administrators E-mail ****
+E-mail address of the person who will manage this machine
+[should be in the form somebody\@somewhere]
+ENTER ADMIN E-MAIL ADDRESS:
 END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice=~/\@/) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'lonAdmEMail'."\t".$choice."\n");
+    close(OUT);
+    $lonAdmEMail=$choice;
+    $flag=1;
+  }
+  else {
+    print "Invalid input (this needs to look like an e-mail address!).\n";
+  }
 }
-else {
+
+
+# get support e-mail address
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+my $lonSupportEMail;
+while (!$flag) {
   print(&lt;&lt;END);
-ENTER LONCAPA DOMAIN:
+
+**** Support E-mail ****
+E-mail address of the person who will receive 
+help requests from LON-CAPA users who access 
+the system via this server. If the address is left blank,
+then a help support form will not be displayed 
+as part of the help menu.
+[should be in the form somebody\@somewhere]
+ENTER SUPPORT E-MAIL ADDRESS:
 END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  $choice =~ s/\s//g;
+  if ( ($choice=~/\@/) || $choice eq '') {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'lonSupportEMail'."\t".$choice."\n");
+    close(OUT);
+    $lonSupportEMail=$choice;
+    $flag=1;
+  }
+  else {
+    print "Invalid input (this either needs to be blank, or look like an e-mail address!).\n";
+  }
 }
+
+# get protocol
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+while (!$flag) {
+  print(&lt;&lt;END);
+
+****  Web Server Protocol ****
+If you plan to run the Apache server with SSL enabled, 
+the protocol should be: https; otherwise it should be http.
+ENTER WEB SERVER PROTOCOL [http]:
+END
+
   my $choice=&lt;&gt;;
   chomp($choice);
-  if ($ipdomain and $choice=~/^\s*$/) {
-    $choice=$ipdomain;
+  if ($choice =~ /^https?$/) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
-    print(OUT 'lonDefDomain'."\t".$choice."\n");
+    print(OUT 'protocol'."\t".$choice."\n");
     close(OUT);
-    $lonDefDomain=$choice;
+    $protocol=$choice;
     $flag=1;
+  } elsif ($choice eq '') {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'protocol'."\t".'http'."\n");
+    close(OUT);
+    $protocol = 'http';
+    $flag = 1;
+  } else {
+    print "Invalid input (only http or https allowed).\n";
   }
-  elsif ($choice!~/\_/ and $choice=~/^\w+$/) {
+}
+
+# get internet domain
+# accept if valid, if not valid, tell user and repeat
+$flag=0;
+while (!$flag) {
+  print(&lt;&lt;END);
+
+****  Internet Domain Name of Your Institution ****
+
+The internet domain name used for servers at your institution 
+should be provided.  This will be similar to: ustate.edu or
+topcollege.ac.uk or myhostingcompany.com, i.e., the part of
+a server hostname which indicates to which organization the 
+server belongs.
+
+ENTER INTERNET DOMAIN NAME:
+END
+
+  my $choice=&lt;&gt;;
+  chomp($choice);
+  if ($choice =~/[^.]+\.[^.]+/) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
-    print(OUT 'lonDefDomain'."\t".$choice."\n");
+    print(OUT 'internet domain'."\t".$choice."\n");
     close(OUT);
-    $lonDefDomain=$choice;
-    $r='l';
+    $intdom=$choice;
     $flag=1;
   }
   else {
-    print "Invalid input (only alphanumeric characters supported).\n";
+    print "Invalid input (must be at least two levels separated by .  - e.g., ustate.edu).\n";
   }
 }
 
-# get e-mail address
+# get hostname
 # accept if valid, if not valid, tell user and repeat
 $flag=0;
-my $lonAdmEmail;
+my $posshostname;
+if (($hostname =~ /^[A-Za-z0-9\-]+$/) && ($intdom ne '')) {
+    $posshostname = $hostname.'.'.$intdom;
+} 
+if (($hostname =~ /^[A-Za-z0-9\-]+\.[A-Za-z0-9\-]+/) &&
+    ($hostname =~ /^[A-Za-z0-9.\-]+$/)) {
+    $posshostname = $hostname;
+}
 while (!$flag) {
   print(&lt;&lt;END);
 
-**** System Administrator's E-mail ****
-E-mail address of the person who will manage this machine
-[should be in the form somebody\@somewhere]
-ENTER E-MAIL ADDRESS:
+****** Hostname of the server/VM *****
+
+The hostname of the server/VM is required. This will be similar to:
+somename.ustate.edu or somename.department.ustate.edu, and would be 
+the web address which users would point their web browsers at to
+access the server.
+
 END
 
+if ($posshostname) {
+    print "ENTER HOSTNAME OF SERVER [$posshostname]:\n";
+} else {
+    print "ENTER HOSTNAME OF SERVER:\n";
+}
+
   my $choice=&lt;&gt;;
   chomp($choice);
-  if ($choice=~/\@/) {
+  if (($choice =~ /^[A-Za-z0-9\-]+\.[A-Za-z0-9\-]+/) &&
+      ($choice =~ /^[A-Za-z0-9.\-]+$/)) {
     open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
-    print(OUT 'lonAdmEmail'."\t".$choice."\n");
+    print(OUT 'hostname'."\t".$choice."\n");
     close(OUT);
-    $lonAdmEmail=$choice;
+    $desiredhostname=$choice;
     $flag=1;
-  }
-  else {
-    print "Invalid input (this needs to look like an e-mail address!).\n";
+  } elsif (($choice eq '') && ($posshostname ne '')) {
+    open(OUT,'&gt;&gt;/tmp/loncapa_updatequery.out');
+    print(OUT 'hostname'."\t$posshostname\n");
+    close(OUT);
+    $desiredhostname = $posshostname;
+    $flag = 1;
+  } else {
+    print "Invalid input (only letters, numbers, - and . allowed, with at least one .).\n";
   }
 }
 
 # update loncapa.conf
-#my $confdir='/etc/httpd/conf/';
-my $confdir='';
+my $confdir = '/etc/httpd/conf/';
+if ('<DIST />' eq 'sles10' || '<DIST />' eq 'sles11' || '<DIST />' eq 'sles12' || '<DIST />' eq 'sles15' || '<DIST />' eq 'suse10.1' || '<DIST />' eq 'suse10.2' || '<DIST />' eq 'suse10.3' || '<DIST />' eq 'suse11.1' || '<DIST />' eq 'suse11.2' || '<DIST />' eq 'suse11.3' || '<DIST />' eq 'suse11.4' || '<DIST />' eq 'suse12.1' || '<DIST />' eq 'suse12.2' || '<DIST />' eq 'suse12.3' || '<DIST />' eq 'suse13.1' || '<DIST />' eq 'suse13.2' || '<DIST />' eq 'debian5' || '<DIST />' eq 'debian6' || '<DIST />' eq 'ubuntu6' || '<DIST />' eq 'ubuntu8' || '<DIST />' eq 'ubuntu10' || '<DIST />' eq 'ubuntu12' || '<DIST />' eq 'ubuntu14' || '<DIST />' eq 'ubuntu16' || '<DIST />' eq 'ubuntu18') {
+     $confdir = '/etc/apache2/';
+}   
 my $filename='loncapa.conf';
 my %perlvar;
     if (-e "$confdir$filename") {
@@ -252,28 +611,29 @@ my %perlvar;
 	    if ($configline =~ /^[^\#]*PerlSetVar/) {
 		my ($unused,$varname,$varvalue)=split(/\s+/,$configline);
 		chomp($varvalue);
-		$perlvar{$varname}=$varvalue;
+		$perlvar{$varname}=$varvalue if $varvalue!~/^\{\[\[\[\[/;
 	    }
 	}
 	close(CONFIG);
     }
     $perlvar{'lonHostID'}=$lonHostID;
     $perlvar{'lonDefDomain'}=$lonDefDomain;
-    $perlvar{'lonAdmEmail'}=$lonAdmEmail;
+    $perlvar{'lonAdmEMail'}=$lonAdmEMail;
+    $perlvar{'lonSupportEMail'}=$lonSupportEMail;
     $perlvar{'lonRole'}=$lonRole;
-    unless ($perlvar{'lonSqlAccess'}) {
-       $perlvar{'lonSqlAccess'}='localhostkey';
-    }
-    unless ($perlvar{'lonLoadLim'}) {
+    unless ($perlvar{'lonLoadLim'} and $perlvar{'lonLoadLim'}!~/\{\[\[\[\[/) {
        $perlvar{'lonLoadLim'}='2.00';
     }
-    unless ($perlvar{'lonExpire'}) {
+    unless ($perlvar{'lonUserLoadLim'} and $perlvar{'lonUserLoadLim'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonUserLoadLim'}='0';
+    }
+    unless ($perlvar{'lonExpire'} and $perlvar{'lonExpire'}!~/\{\[\[\[\[/) {
        $perlvar{'lonExpire'}='86400';
     }
-    unless ($perlvar{'lonReceipt'}) {
+    unless ($perlvar{'lonReceipt'} and $perlvar{'lonReceipt'}!~/\{\[\[\[\[/) {
        my $lonReceipt='';
-       srand($$.time);
-       my @alnum=(0..9,a..z);
+       srand(time ^ $$ ^ unpack "%L*", `ps axww | gzip`);
+       my @alnum=(0..9,"a".."z");
        foreach my $i (1..20) {
 	 $lonReceipt.=$alnum[int(rand(36))];
        }
@@ -283,8 +643,12 @@ my %perlvar;
       die("Cannot output to $confdir$filename\n");
     foreach my $key (keys %perlvar) {
       my $value=$perlvar{$key};
+      my $line = "PerlSetVar     $key      $value"; 
+      if ($value eq '') {
+          $line = '#'.$line;
+      }
       print(OUT &lt;&lt;END);
-PerlSetVar     $key      $value
+$line
 END
     }
     close(OUT);
@@ -292,13 +656,29 @@ END
 </perlscript>
 </file>
 <file>
-<target dist='default'>/</target>
+<target dist='default'>/etc/httpd/conf/</target>
+<target dist='sles10 sles11 sles12 sles15 suse10.1 suse10.2 suse10.3 suse11.1 suse11.2 suse11.3 suse11.4 suse12.1 suse12.2 suse12.3 suse13.1 suse13.2 debian5 debian6 ubuntu6 ubuntu8 ubuntu10 ubuntu12 ubuntu14 ubuntu16 ubuntu18'>/etc/apache2/</target>
 <perlscript mode='fg'>
+sub securesetting {
+    my (%perlvar)=@_;
+    my $securestatus='unknown';
+    my $securenum='';
+    if      ( $perlvar{'loncAllowInsecure'}&&  $perlvar{'londAllowInsecure'}) {
+	$securestatus='no';                  $securenum='4';
+    } elsif ( $perlvar{'loncAllowInsecure'}&& !$perlvar{'londAllowInsecure'}) {
+	$securestatus='lond';                $securenum='3';
+    } elsif (!$perlvar{'loncAllowInsecure'}&&  $perlvar{'londAllowInsecure'}) {
+	$securestatus='lonc';                $securenum='2';
+    } elsif (!$perlvar{'loncAllowInsecure'}&& !$perlvar{'londAllowInsecure'}) {
+	$securestatus='yes (lond and lonc)'; $securenum='1';
+    }
+    return ($securestatus,$securenum);
+}
 # read values from loncapa.conf
-#my $confdir='/etc/httpd/conf/';
-my $confdir='';
+my $confdir = "<TARGET />";
 my $filename='loncapa.conf';
 my %perlvar;
+my ($securestatus,$securenum);
     if (-e "$confdir$filename") {
 	open(CONFIG,'&lt;'.$confdir.$filename) or 
           die("Can't read $confdir$filename");
@@ -311,169 +691,574 @@ my %perlvar;
 	}
 	close(CONFIG);
     }
+    unless ($perlvar{'lonLoadLim'} and $perlvar{'lonLoadLim'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonLoadLim'}='2.00';
+    }
+    unless ($perlvar{'lonUserLoadLim'} and $perlvar{'lonUserLoadLim'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonUserLoadLim'}='0';
+    }
+    unless ($perlvar{'lonExpire'} and $perlvar{'lonExpire'}!~/\{\[\[\[\[/) {
+       $perlvar{'lonExpire'}='86400';
+    }
+    unless ($perlvar{'londAllowInsecure'} and $perlvar{'londAllowInsecure'}!~/\{\[\[\[\[/) {
+       $perlvar{'londAllowInsecure'}='1';
+    }
+    unless ($perlvar{'loncAllowInsecure'} and $perlvar{'loncAllowInsecure'}!~/\{\[\[\[\[/) {
+       $perlvar{'loncAllowInsecure'}='1';
+    }
+    ($securestatus,$securenum)=&securesetting(%perlvar);
+    unless ($perlvar{'lonReceipt'} and $perlvar{'lonReceipt'}!~/\{\[\[\[\[/) {
+       my $lonReceipt='';
+       srand(time ^ $$ ^ unpack "%L*", `ps axww | gzip`);
+       my @alnum=(0..9,"a".."z");
+       foreach my $i (1..20) {
+	 $lonReceipt.=$alnum[int(rand(36))];
+       }
+       $perlvar{'lonReceipt'}=$lonReceipt;
+    }
+my %perlvarstatic;
+    if (-e "${confdir}loncapa_apache.conf") {
+	open(CONFIG,'&lt;'.$confdir.'loncapa_apache.conf') or 
+          die("Can't read ${confdir}loncapa_apache.conf");
+	while (my $configline=&lt;CONFIG&gt;) {
+	    if ($configline =~ /^[^\#]*PerlSetVar/) {
+		my ($unused,$varname,$varvalue)=split(/\s+/,$configline);
+		chomp($varvalue);
+		$perlvarstatic{$varname}=$varvalue;
+	    }
+	}
+	close(CONFIG);
+    }
+
+    my (@hosts_files, @domain_files);
+    if ( $lonCluster ne 'existing') {
+	push(@domain_files,'../'.$lonCluster.'_domain.tab',
+	     '../'.$lonCluster.'_dns_domain.tab');
+	push(@hosts_files,'../'.$lonCluster.'_hosts.tab',
+	     '../'.$lonCluster.'_dns_hosts.tab');
+    }
+    push(@domain_files,'/home/httpd/lonTabs/domain.tab',
+         '/home/httpd/lonTabs/dns_domain.tab');
+    push(@hosts_files,'/home/httpd/lonTabs/hosts.tab',
+         '/home/httpd/lonTabs/dns_hosts.tab');
+
+    if (!$domainDescription) {
+	foreach my $file (@domain_files) {
+	    open(IN,'&lt;'.$file);
+	    while(my $line = &lt;IN&gt;) {
+		if ($line =~ /^\Q$perlvar{'lonDefDomain'}\E\:/) {
+		    (undef,$domainDescription,$domainTabExtras)=split(/:/,$line,3);
+		    chomp($domainDescription);
+		    chomp($domainTabExtras);
+		    # the remaining field (primary lib server) is handled later
+		    $domainTabExtras = join(':',(split(/:/,$domainTabExtras))[0..5]);
+		    last;
+		}
+	    }
+	    close(IN);
+	    last if ($domainDescription);
+	}
+    }
+
+    if ((!$protocol) || (!$desiredhostname)) {
+        foreach my $file (@hosts_files) {
+            open(IN,'&lt;'.$file);
+            while(my $line = &lt;IN&gt;) {
+                if ($line =~ /^\Q$perlvar{'lonHostID'}\E:\Q$perlvar{'lonDefDomain'}\E\:(?:access|library)\:([^:]+)\:(https?)/) {
+                    if (!$desiredhostname) {
+                        $desiredhostname = $1;
+                    }
+                    if (!$protocol) { 
+                        $protocol = $2;
+                        chomp($protocol);
+                    }
+                    last;
+                }
+            }
+        }
+    }
+
+    if (!$protocol) {
+        $protocol = 'http';
+    }
+
+    if (!$intdom) {
+        foreach my $file (@hosts_files) {
+            open(IN,'&lt;'.$file);
+            while(my $line = &lt;IN&gt;) {
+                if ($line =~ /^\Q$perlvar{'lonHostID'}\E:\Q$perlvar{'lonDefDomain'}\E\:(?:access|library)\:[^:]+\:https?\:([^:]+)/) {
+                    $intdom = $1;
+                    chomp($intdom);
+                    last;
+                }
+            }
+        }
+    }
+
+    while(!$primaryLibServer && (@hosts_files || @domain_files)) {
+	my $file = shift(@domain_files);
+        open(IN,'&lt;'.$file);
+        while(my $line = &lt;IN&gt;) {
+            if ($line =~ /^\Q$perlvar{'lonDefDomain'}\E\:/) {
+		$primaryLibServer=(split(/:/,$line))[8];
+                chomp($primaryLibServer);
+            }
+        }
+        close(IN);
+	last if ($primaryLibServer);
+	$file = shift(@hosts_files);
+	open(IN,'&lt;'.$file);
+	while(my $line = &lt;IN&gt;) {
+	    if ($line =~ /^([^\:]+)\:\Q$perlvar{'lonDefDomain'}\E\:library\:/) {
+		push(@libservers,$1);
+	    }
+	}
+	# make list unique
+	@libservers = keys(%{{ map { $_ => 1 } (@libservers) }});
+	close(IN);
+	if (@libservers == 1) {
+	    $primaryLibServer = $libservers[0];
+	}
+    }
+   
 # implement editing logic below, interactively
-# update loncapa.conf until 7 is entered
+# update loncapa.conf until 15 is entered
+
+my $flag=0;
 
-$flag=0;
 while (!$flag) {
   print(&lt;&lt;END);
 
 ===============================================================================
 This is now the current configuration of your machine.
-1) Machine Name: $perlvar{'lonHostID'}
-2) Domain Name: $perlvar{'lonDefDomain'}
-3) System Administrator's E-mail Address: $perlvar{'lonAdmEmail'}
-4) Role: $perlvar{'lonRole'}
-5) Cache Expiration Time: $perlvar{'lonExpire'}
-6) Server Load: $perlvar{'lonLoadLim'}
-7) Everything is correct up above
-END
+ 1) Domain Name: $perlvar{'lonDefDomain'}
+ 2) Domain Description: $domainDescription
+ 3) Machine Name: $perlvar{'lonHostID'}
+ 4) ID of primary library server for domain: $primaryLibServer
+ 5) Server Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
+ 6) Support E-mail Address: $perlvar{'lonSupportEMail'}
+ 7) Web Server Protocol (http or https): $protocol 
+ 8) Internet Domain Name: $intdom 
+ 9) Hostname: $desiredhostname
+10) Role: $perlvar{'lonRole'}
+11) Cache Expiration Time: $perlvar{'lonExpire'}
+12) Server Load: $perlvar{'lonLoadLim'}
+13) User Load: $perlvar{'lonUserLoadLim'}
+14) Allow only secure connections: $securestatus 
+15) Everything is correct up above
+END
+
+my @error;
+foreach my $v ($perlvar{'lonDefDomain'},$perlvar{'lonHostID'}) {
+   if (length($v)>35) { push(@error,"Name $v too long"); }		
+   if (length($v)<2) { push(@error,"Name $v too short"); }
+   if ($v=~/capa/i) {
+	if ($v!~/^oucapa\d+$/ && 
+	    ($v!~/^capa\d+$/ && $perlvar{'lonDefDomain'} eq 'uwsp')) {
+		 push(@error,"Name $v contains 'capa'");
+	}
+   }
+   foreach my $bad ('res','raw','userfiles','priv','adm','uploaded',
+	'editupload') {
+      push(@error,"\nName $v reserved.") if $v eq $bad;
+   }
+   if ($v=~/[^\w\-.]/) { push(@error,"Name $v contains special characters"); }
+}
+if ($domainDescription =~ /^\s*$/) {
+   push(@error,"Domain Description is blank.");
+} elsif ($domainDescription!~/^[\(\)\-\w\s,]+$/) {
+   push(@error,"Domain Description contains special characters.");
+} 
+foreach my $v ($perlvar{'lonExpire'},$perlvar{'lonLoadLim'}) {
+   unless ($v=~/^[\d+\.]+$/) { push(@error,"Number expected instead of $v"); }
+}
+unless (($perlvar{'lonRole'} eq 'library') || ($perlvar{'lonRole'} eq 'access')) {
+   push(@error,"Invalid Role");
+}
+
+unless (($protocol eq 'http') || ($protocol eq 'https')) {
+   push(@error,"Invalid Protocol (must be http or https");
+}
+
+if (!defined($intdom)) { 
+   push(@error,"No internet domain name designated. Enter something like ustate.edu"); 
+} elsif ($intdom !~ /[^.]+\.\w{2,6}$/) {
+   push(@error,"Invalid Internet domain name (must be at least two levels separated by .  - e.g., ustate.edu");
+}
+
+if (!defined($primaryLibServer)) {
+   if (@libservers > 0) {
+       push(@error,"No primary library server ID designated. Choose from: ".join(',',sort(@libservers)));
+   } else {
+       push(@error,"No library servers in this domain (including current server)");
+   }
+} else {
+   if (length($primaryLibServer)>35) { push(@error,"Primary Library Server ID:  $primaryLibServer too long"); }
+   if (length($primaryLibServer)<2) { push(@error,"Primary Library Server ID:  $primaryLibServer too short"); }
+   if ($primaryLibServer =~/capa/i) {
+        if ($primaryLibServer!~/^oucapa\d+$/ &&
+            ($primaryLibServer!~/^capa\d+$/ && $perlvar{'lonDefDomain'} eq 'uwsp')) {
+                 push(@error,"Primary library server ID $primaryLibServer contains 'capa'")
+        }
+   }
+   foreach my $bad ('res','raw','userfiles','priv','adm','uploaded',
+        'editupload') {
+      push(@error,"Primary library server ID $primaryLibServer reserved.") if $primaryLibServer eq $bad;
+   }
+   if ($primaryLibServer=~/[^\w\-.]/) { push(@error,"Primary library server ID $primaryLibServer contains special characters"); }
+}
+
+
+if (@error) { print "\n*** ERRORS: \n\t".join("\n\t",@error)."\n"; }
   print(&lt;&lt;END);
-ENTER A CHOICE OF 1-6 TO CHANGE, otherwise ENTER 7:
+ENTER A CHOICE OF 1-14 TO CHANGE, otherwise ENTER 15:
 END
 my $choice=&lt;&gt;;
 chomp($choice);
   if ($choice==1) {
   print(&lt;&lt;END);
-1) Machine Name: $perlvar{'lonHostID'}
-ENTER NEW VALUE:
+1) Domain Name: $perlvar{'lonDefDomain'}
+ENTER NEW VALUE (this is an internal value used to identify a group of
+                 LON-CAPA machines, it must be alphanumerical, we suggest
+                 using a part of your actual DNS domain. For example, for
+                 the machine loncapa.msu.edu, we set the Domain to msu):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonHostID'}=$choice2;
+    $perlvar{'lonDefDomain'}=$choice2;
   }
   elsif ($choice==2) {
   print(&lt;&lt;END);
-2) Domain Name: $perlvar{'lonDefDomain'}
-ENTER NEW VALUE:
+2) Domain Description: $domainDescription
+ENTER NEW VALUE (this should be a string that describes your domain, spaces
+                 and punctuation are fine except for ':'):
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonDefDomain'}=$choice2;
+    $domainDescription=$choice2;
   }
   elsif ($choice==3) {
   print(&lt;&lt;END);
-3) System Administrator's E-mail Address: $perlvar{'lonAdmEmail'}
-ENTER NEW VALUE:
+3) Machine Name: $perlvar{'lonHostID'}
+ENTER NEW VALUE (this will be the name of the machine in the LON-CAPA network
+                 it cannot contain any of '_' '-' '.' or ':'. We suggest that
+                 if you are in the domain 'example' and are the first library
+                 server you enter 'examplel1') :
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonAdmEmail'}=$choice2;
+    $perlvar{'lonHostID'}=$choice2;
   }
   elsif ($choice==4) {
   print(&lt;&lt;END);
-4) Role: $perlvar{'lonRole'}
-ENTER NEW VALUE:
+4) ID of primary library server for domain: $primaryLibServer
+ENTER NEW VALUE (this will be the LON-CAPA Machine ID of a library server in
+                 your domain; it cannot contain any of '_' '-' '.' or ':'. 
+                 This server will be where domain data which are not 
+                 associated with any specific home library server
+                 will be stored (e.g., e-mail broadcast by Domain Coordinators
+                 to users in the domain).
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonRole'}=$choice2;
+    $primaryLibServer=$choice2;
   }
   elsif ($choice==5) {
   print(&lt;&lt;END);
-5) Cache Expiration Time: $perlvar{'lonExpire'}
+5) Server Administrator's E-mail Address: $perlvar{'lonAdmEMail'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonExpire'}=$choice2;
+    $perlvar{'lonAdmEMail'}=$choice2;
   }
   elsif ($choice==6) {
   print(&lt;&lt;END);
-6) Server Load: $perlvar{'lonLoadLim'}
+6) Support E-mail Address: $perlvar{'lonSupportEMail'}
 ENTER NEW VALUE:
 END
     my $choice2=&lt;&gt;;
     chomp($choice2);
-    $perlvar{'lonLoadLim'}=$choice2;
+    $perlvar{'lonSupportEMail'}=$choice2;
   }
   elsif ($choice==7) {
-    $flag=1;
+  print(&lt;&lt;END);
+7) Server Protocol (http or https): 
+ENTER NEW VALUE: (this should be either 'http' or 'https'
+                 if in doubt set to 'http'):
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $protocol=$choice2;
   }
-  else {
+  elsif ($choice==8) {
+  print(&lt;&lt;END);
+8) Internet Domain Name of Institution
+ENTER NEW VALUE: 
 
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $intdom=$choice2;
   }
-}
-</perlscript>
-</file>
-<file>
-<target dist='default'>loncom/hosts.tab</target>
-<perlscript mode='fg'>
-unless (-l "<TARGET />") {
+  elsif ($choice==9) {
   print(&lt;&lt;END);
-
-===============================================================================
-What hosts.tab would you like to have installed?
-(hosts.tab is a listing of all other internet machines
-that a server system considers to be valid server systems
-on the LON-CAPA network)
-
-1) PRODUCTION - you want to deliver courses today or sometime very soon
-                on this machine
-2) STAND-ALONE - you want this machine to run in 'stand-alone' mode and
-                 not be connected to other LON-CAPA machines for now
-3) DEVELOPMENT - you want to play with or explore LON-CAPA
-4) PRESERVE the existing hosts.tab (/home/httpd/lonTabs/hosts.tab)
+9) Hostname of Server/VM
+ENTER NEW VALUE:
 
 END
-# Option number 26 will install rawhide_hosts.tab, but
-# the typical user does not want to be part of an intensive
-# machine test cluster.
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $desiredhostname=$choice2;
+  }
 
-# get input
-# if valid then process, otherwise loop
-my $hostname=`hostname`;chomp($hostname);
-my $hostaddress=`hostname -i $hostname`;chomp($hostaddress);
-$flag=0;
-while (!$flag) {
-  print "ENTER 1, 2, 3, or 4:\n";
-  my $choice=&lt;&gt;;
-  chomp($choice);
-  if ($choice==1) {
-    $lonCluster='production';
-    `rm -f ../hosts.tab`;
-    `ln -s production_hosts.tab ../hosts.tab`;
-    $flag=1;
+  elsif ($choice==10) {
+  print(&lt;&lt;END);
+10) Role: $perlvar{'lonRole'}
+ENTER NEW VALUE (this should be either 'access' or 'library' 
+                 if in doubt select 'library'):
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $perlvar{'lonRole'}=$choice2;
   }
-  elsif ($choice==2) {
-    $lonCluster='standalone';
-    open(OUT,'&gt;../standalone_hosts.tab') or
-      die("cannot open loncom/standalone_hosts.tab for output\n");
-    print(OUT &lt;&lt;END);
-$perlvar{'lonHostID'}:$perlvar{'lonDefDomain'}:$perlvar{'lonRole'}:$hostname:$hostaddress
+  elsif ($choice==11) {
+  print(&lt;&lt;END);
+11) Cache Expiration Time: $perlvar{'lonExpire'}
+ENTER NEW VALUE (in seconds, 86400 is a reasonable value):
 END
-    close(OUT);
-    `rm -f ../hosts.tab`;
-    `ln -s standalone_hosts.tab ../hosts.tab`;
-    $flag=1;
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $perlvar{'lonExpire'}=$choice2;
   }
-  elsif ($choice==3) {
-    $lonCluster='development';
-    `rm -f loncom/hosts.tab`;
-    `ln -s development_hosts.tab ../hosts.tab`;
-    $flag=1;
+  elsif ($choice==12) {
+  print(&lt;&lt;END);
+12) Server Load: $perlvar{'lonLoadLim'}
+ENTER NEW VALUE:
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $perlvar{'lonLoadLim'}=$choice2;
   }
-  elsif ($choice==4) {
-    $lonCluster='existing';
-    `rm -f ../hosts.tab`;
-    `touch existing_hosts.tab`;
-    if (-e '/home/httpd/lonTabs/hosts.tab') {
-      `cp /home/httpd/lonTabs/hosts.tab ../existing_hosts.tab`;
+  elsif ($choice==13) {
+  print(&lt;&lt;END);
+13) User Load: $perlvar{'lonUserLoadLim'}
+Numer of users that can login before machine is 'overloaded'
+ENTER NEW VALUE (integer value, 0 means there is no limit):
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    $perlvar{'lonUserLoadLim'}=$choice2;
+  }
+  elsif ($choice==14) {
+  print(&lt;&lt;END);
+14) Allow only secure connections: $securestatus 
+The Lon-CAPA communication daemons lonc and lond can be configured to
+allow only secure connections by default.
+
+POSSIBLE CHOICES:
+1) allow only secure connections and don't connect to machines that
+    can not be connected to securely
+2) allow only secure connections but allow this machine to connect to 
+    machines that don't support secure connections
+3) allow insecure connections to this machine but only allow connections
+    to machines that support secure connections
+4) allow insecure connections
+ENTER NEW VALUE (currently $securenum):
+END
+    my $choice2=&lt;&gt;;
+    chomp($choice2);
+    if      ($choice2 eq '1') {
+	$perlvar{'loncAllowInsecure'}=0;$perlvar{'londAllowInsecure'}=0;
+    } elsif ($choice2 eq '2') {
+	$perlvar{'loncAllowInsecure'}=0;$perlvar{'londAllowInsecure'}=1;
+    } elsif ($choice2 eq '3') {
+	$perlvar{'loncAllowInsecure'}=1;$perlvar{'londAllowInsecure'}=0;
+    } elsif ($choice2 eq '4') {
+	$perlvar{'loncAllowInsecure'}=1;$perlvar{'londAllowInsecure'}=1;
     }
-    `ln -s existing_hosts.tab ../hosts.tab`;
-    $flag=1;
+    ($securestatus,$securenum)=&securesetting(%perlvar);
   }
-  elsif ($choice==26) {
-    $lonCluster='rawhide';
-    `rm -f ../hosts.tab`;
-    `ln -s rawhide_hosts.tab ../hosts.tab`;
+  elsif (($choice==15) && (!@error)) {
     $flag=1;
   }
   else {
-
+    print "Invalid input.\n";
   }
 }
 
+    open(OUT,"&gt;$confdir$filename") or
+      die("Cannot output to $confdir$filename\n");
+    foreach my $key (keys %perlvar) {
+      my $value=$perlvar{$key};
+      my $line = "PerlSetVar     $key      $value";
+      if ($value eq '') {
+          $line = '#'.$line;
+      }
+      print(OUT &lt;&lt;END) unless $perlvarstatic{$key};
+$line
+END
+    }
+    close(OUT);
+</perlscript>
+</file>
+<file>
+<target dist='default'>loncom/hosts.tab</target>
+<perlscript mode='fg'>
+unless (-l "<TARGET />") {
+  if ($desiredhostname eq '') { 
+      my $hostname=`hostname -f`;chomp($hostname);
+      $desiredhostname = $hostname;
+  }
+  my $date=`date -I`; chomp($date);
+  my $lonHostID=$perlvar{'lonHostID'};
+  $lonHostID=~s/[^\w\-.]//g;
+  my $lineexistflag=0;
+  my $hostidexistflag=0;
+  my $line2insert=&lt;&lt;END;
+$perlvar{'lonHostID'}:$perlvar{'lonDefDomain'}:$perlvar{'lonRole'}:$desiredhostname:$protocol:$intdom
+END
+  if (!$domainTabExtras) {
+	$domainTabExtras=':::::';
+  }
+  my $domaininsert="$perlvar{'lonDefDomain'}:$domainDescription:$domainTabExtras:$primaryLibServer\n";
+  if ($lonCluster eq 'standalone') {
+    open(OUT,'&gt;../'.$lonCluster.'_hosts.tab') or
+      die('file generation error');
+      print(OUT $line2insert);
+      print OUT ("^$desiredhostname:$protocol\n");
+    close(OUT);
+    open(OUT,'&gt;../'.$lonCluster.'_dns_hosts.tab') or
+      die('file generation error');
+      print(OUT $line2insert);
+    close(OUT);
+    open(OUT,'&gt;../'.$lonCluster.'_domain.tab') or
+      die('file generation error');
+      print(OUT $domaininsert);
+    close(OUT);
+    open(OUT,'&gt;../'.$lonCluster.'_dns_domain.tab') or
+      die('file generation error');
+      print(OUT $domaininsert);
+    close(OUT);
+  }
+  if ($flag==1) {
+    `rm -f ../hosts.tab`;
+    `rm -f ../dns_hosts.tab`;
+    `ln -s ${lonCluster}_dns_hosts.tab ../dns_hosts.tab`;
+    open(IN,'&lt;../'.$lonCluster.'_dns_hosts.tab');
+    while(my $line = &lt;IN&gt;) {
+      if ($line =~ /^\Q$line2insert\E$/) {
+        $lineexistflag=1;
+      }
+      if ($line =~ /^\Q$lonHostID\E\:/) {
+        $hostidexistflag=1;
+      }
+    }
+    close(IN);
+    if ($hostidexistflag and !$lineexistflag) {
+      print &lt;&lt;END;
+WARNING: $lonHostID already exists inside
+loncapa/loncom/${lonCluster}_dns_hosts.tab.  The entry inside
+${lonCluster}_dns_hosts.tab does not match your settings.
+An entry inside ${lonCluster}_hosts.tab will be made
+with your new values.
+END
+      `grep -v "$lonHostID:" ../${lonCluster}_hosts.tab &gt; ../new_${lonCluster}_hosts.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_hosts.tab') or
+         die("cannot open loncom/${lonCluster}_hosts.tab for output\n");
+         print(OUT $line2insert);
+       close(OUT);
+      `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
+      # email appropriate message
+      `echo "REPLACE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "REPLACE:$lonCluster:$lonHostID:$protocol:$intdom:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif ($hostidexistflag and $lineexistflag) {
+      print &lt;&lt;END;
+Entry exists in ${lonCluster}_dns_hosts.tab. Making duplicate entry in ${lonCluster}_hosts.tab
+END
+      `grep -v "$lonHostID:" ../${lonCluster}_hosts.tab &gt; ../new_${lonCluster}_hosts.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_hosts.tab') or
+         die("cannot open loncom/${lonCluster}_hosts.tab for output\n");
+         print(OUT $line2insert);
+       close(OUT);
+      `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
+      # email appropriate message
+      `echo "STABLEUPDATE:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "STABLEUPDATE:$lonCluster:$lonHostID:$protocol:$intdom:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif (!$hostidexistflag and !$lineexistflag) {
+      print &lt;&lt;END;
+New entry for $lonCluster.
+END
+      `cat ../${lonCluster}_hosts.tab &gt; ../new_${lonCluster}_hosts.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_hosts.tab') or
+         die("cannot open loncom/new_${lonCluster}_hosts.tab for output\n");
+         print(OUT $line2insert);
+       close(OUT);
+      `ln -s new_${lonCluster}_hosts.tab ../hosts.tab`;
+      # email appropriate message
+      `echo "INSERT:$lonCluster:$lonHostID:$date:$line2insert" | mail -s "INSERT:$lonCluster:$lonHostID:$protocol:$intdom:$date" installrecord\@mail.lon-capa.org`;
+    }
+  }
+  $lineexistflag=0;
+  my $domainexistflag=0;
+  if ($flag==1) {
+    `rm -f ../domain.tab`;
+    `rm -f ../dns_domain.tab`;
+    `ln -s ${lonCluster}_dns_domain.tab ../dns_domain.tab`;
+    open(IN,'&lt;../'.$lonCluster.'_dns_domain.tab');
+    while(my $line = &lt;IN&gt;) {
+      if ($line =~/^\Q$domaininsert\E$/) {
+        $lineexistflag=1;
+      }
+      if ($line =~/^\Q$perlvar{'lonDefDomain'}\E\:/) {
+        $domainexistflag=1;
+      }
+    }
+    close(IN);
+    if ($domainexistflag and !$lineexistflag) {
+      print &lt;&lt;END;
+WARNING: $perlvar{'lonDefDomain'} already exists inside
+loncapa/loncom/${lonCluster}_dns_domain.tab.  The entry inside
+${lonCluster}_dns_domain.tab does not match your settings.
+An entry will be made in inside ${lonCluster}_domain.tab
+with your new values.
+END
+      `grep -v "$perlvar{'lonDefDomain'}:" ../${lonCluster}_domain.tab &gt; ../new_${lonCluster}_domain.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_domain.tab') or
+         die("cannot open loncom/${lonCluster}_domain.tab for output\n");
+         print(OUT $domaininsert);
+       close(OUT);
+      `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
+      # email appropriate message
+      `echo "REPLACEdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "REPLACEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif ($domainexistflag and $lineexistflag) {
+      `grep -v "$perlvar{'lonDefDomain'}:" ../${lonCluster}_domain.tab &gt; ../new_${lonCluster}_domain.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_domain.tab') or
+         die("cannot open loncom/${lonCluster}_domain.tab for output\n");
+         print(OUT $domaininsert);
+       close(OUT);
+      print &lt;&lt;END;
+Entry exists in ${lonCluster}_dns_domain.tab. Making duplicate entry in ${lonCluster}_domain.tab
+END
+      `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
+      # email appropriate message
+      `echo "STABLEUPDATEdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "STABLEUPDATEdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+    elsif (!$domainexistflag and !$lineexistflag) {
+      print &lt;&lt;END;
+New entry for $lonCluster.
+END
+      `cat ../${lonCluster}_domain.tab &gt; ../new_${lonCluster}_domain.tab`;
+       open(OUT,'&gt;&gt;../new_'.$lonCluster.'_domain.tab') or
+         die("cannot open loncom/new_${lonCluster}_domain.tab for output\n");
+         print(OUT $domaininsert);
+       close(OUT);
+      `ln -s new_${lonCluster}_domain.tab ../domain.tab`;
+      # email appropriate message
+      `echo "INSERTdom:$lonCluster:$lonHostID:$date:$domaininsert" | mail -s "INSERTdom:$lonCluster:$lonHostID:$date" installrecord\@mail.lon-capa.org`;
+    }
+  }
 }
 </perlscript>
 </file>