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+====== isohome ======
+Isohome is a simple script that tries to make an image of your CS home directory that is suitable for burning onto a CD or DVD.
+It will confirm that you are running it from the machine where your home directory is actually a local disk.  If not it will tell you which machine you need to run the script from.
+So, bring a blank CD into the lab and give it a go.
+For the curious, here is the script.
+-Greg
+<code>
+#!/usr/bin/bash
+#
+# isohome: a script to make an iso image of a users home
+# directory in a users home directory by Greg Priest-Dorman
+#
+# $Id: isohome,v 1.7 2004/05/15 06:42:11 priestdo Exp $
+#
+IFS="
+"
+ECHO=/usr/bin/echo
+MKISOFS=/bin/mkisofs
+BKUPNAME=$HOME/$USER-home-`/usr/bin/date +%Y-%m-%d`.iso
+DU=/usr/local/bin/du
+MAIL=/usr/ucb/mail
+DF=/usr/local/bin/df
+AWK=/usr/local/bin/awk
+#
+# Get the name of the system that the users home directory lives on from the nis auto.home map
+#
+HomeHost=`ypcat -k auto.home|grep $USER|$AWK '{ print $2 }'|cut -f1 -d:`
+#
+if [ $HOST == $HomeHost ] ; then
+    $ECHO "\n Checking available space...\n"
+    HomeUsed=`$DU -sk $HOME |$AWK '{ print int(($1  / 1024) + .5)}'`
+    HomeFree=`$DF -k|grep $HOME | $AWK '{ print int(($3 / 1024) + -99.5)}'`
+    if [ ${HomeUsed} -lt ${HomeFree} ] ; then
+	$ECHO "\n There is enough free space to create the backup image.\n"
+	MEDIA=""
+	if [ ${HomeUsed} -lt 650 ] ; then
+	    $ECHO " Your backup image will fit on a single CD\n"
+	    MEDIA="CD"
+	else
+	    if  [ ${HomeUsed} -lt 4000 ] ; then
+		$ECHO " Your backup image may not fit on a single CD, but will fit on a DVD.\n"
+		MEDIA="DVD"
+	    fi
+	fi
+	if [ ${MEDIA} != "" ] ; then
+	    $ECHO " It will use around $HomeUsed Meg.\n"
+	    $ECHO " If you choose to proceed an iso9660 image of your home directory"
+	    $ECHO " will be created and a log message will be sent to Greg.  Once"
+	    $ECHO " complete you will have to copy the backup image to a machine"
+	    $ECHO " that has a $MEDIA burner in order to make your $MEDIA.\n"
+	    $ECHO " Please remove your image from the suns once you"
+	    $ECHO " have burned your $MEDIA.  Should you forget to"
+	    $ECHO " remove it, it will be removed once it is more than"
+	    $ECHO " a day old.\n"
+	    $ECHO " The image will skip anything ending in"
+	    $ECHO ' ".iso", "~", "#" or containing the word'
+	    $ECHO ' "cache" in its name or its directory name.\n'
+	    $ECHO "Do you wish to proceed? (y/n):"
+	    read YN
+	    case $YN in
+		y|Y|yes|Yes|YES|yep)
+		$ECHO "\nHere we go...\n"
+		for FOUND in `find $HOME -print |egrep  'cache|.iso'`
+		  do
+		  $ECHO "Ignoring $FOUND"
+		done
+#
+# options to mkisofs explained:
+#     -J Joliet directory records in addition to iso9660 file names
+#     -x exclude pattern(seems to like '*' better than -m)
+#     -m exclude glob
+#     -r generates additional Rock Ridge protocol records with intelligent uid and gid
+#     -T Generate a TRANS.TBL in each directory for use in non-Rock Ridge system
+#     -o output file name
+#
+#  put all togethe and you get a cd that should be readable on a very wide varity of systems
+#  HOWEVER,  consider changing the "-r" to "-R" which will not mess with the uid
+#  and gid - see man page
+#
+		$MKISOFS  -J -x '*cache*' -m '*.iso' -m '~' -m '#' -r -T -o  $BKUPNAME  $HOME && $ECHO " $0 run as $USER\n free before = ($HomeFree +100)Meg\n `$DU -sh $BKUPNAME`" |$MAIL -s "$0 run as $USER" priestdo@cs.vassar.edu  && $ECHO "* * * $BKUPNAME created * * *"
+       		;;
+		*)
+		$ECHO "\n If thats the way you feel about it...\n ... script aborting"
+		;;
+	    esac
+	fi
+    else
+	$ECHO "\n There is not enough free space in your home directory"
+	$ECHO " to do the backup.  Please ask Greg for assistance."
+	$ECHO "... script aborting\n"
+    fi
+#
+else
+    $ECHO "\n You need to run $0 from ${HomeHost}. "
+    $ECHO " When this script exits issue the command: \n"
+    $ECHO "   ssh ${USER}@${HomeHost}\n"
+    $ECHO "... script aborting\n"
+fi
+</code>