Initial commit

README.md

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 # freeze-thaw
-Freeze/Thaw scripts.  Or, poor-man's DeepFreeze
+
+## Freeze/Thaw scripts.  Or, poor-man's DeepFreeze
+
+A long time ago I was working with a Windows machine that had DeepFreeze installed.  Deep Freeze will take a snapshot of
+system upon demand and can revert to that snapshot after every boot.  We used it in an assisted-living library to
+prevent the residents from over-riding system settings, changing the language, setting the wallpaper to porn or deleting
+the C:/Windows directory (all of which happened at one point or another)
+
+There are certainly more robust or professional solutions but this was quick, easy to understand and effective.
+
+I then converted these machines to Linux (since the browser was the application used 98% of the time) and I wanted to
+emulate Deep Freeze.  I stumbled across these scripts, tweaked them and held onto them since they worked so well.
+
+ 

freeze.sh

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+#!/usr/bin/env bash
+#===============================================================================
+#
+#          FILE:  freeze.sh
+# 
+#         USAGE:  sudo ./freeze.sh 
+# 
+#   DESCRIPTION:  Part of the Freeze/Thaw set of scripts.  This script creates a 
+#                 tarball of the users home directory
+# 
+#       OPTIONS:  ---
+#  REQUIREMENTS:  Root privileges.  You must be logged in as a 'root' user
+#                 You cannot be logged in as the user to be 'frozen'
+#          BUGS:  ---
+#         NOTES:  Inspired by 
+#                 http://www.linuxquestions.org/linux/answers/Applications_GUI_Multimedia/Deepfreeze_for_Linux
+#        AUTHOR:  C Hawley 
+#       COMPANY:  
+#       VERSION:  1.0
+#       CREATED:  02/24/2011 12:18:55 PM EST
+#      REVISION: Mon 09 Oct 2017 05:15:49 PM EDT
+#===============================================================================
+
+set -o nounset                               # Treat unset variables as an error
+
+# Check for empty argument
+if [ -z "${1:-}" ]; then
+	arg="undefined"
+	echo "You must specify the username and archive location"
+	exit 1
+fi
+
+frozenuser="${1}"
+frozenarchive="${2}/${frozenuser}.frozen.tgz"
+
+# If Previously frozen file exists - remove it.
+if [ -f "${frozenarchive}" ]; then
+	rm -f "${frozenarchive}"
+fi
+
+# create new frozen file
+# tar options:
+# -p extract all protection information
+# -P don't strip leading '/'s from file names
+tar -cpPf "${frozenarchive}" /home/"${frozenuser}"

thaw.sh

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+#!/usr/bin/env bash
+#===============================================================================
+#
+#          FILE:  thaw.sh
+# 
+#         USAGE:  sudo ./thaw.sh 
+# 
+#   DESCRIPTION:  Part of the Freeze/Thaw set of scripts.  This script extracts a 
+#                 tarball of the users home directory
+# 
+#       OPTIONS:  ---
+#  REQUIREMENTS:  Must be run at boot:
+#                 Save this script in the /etc/init.d/ directory.
+#                 Make it executable (chmod 755 /ect/init.d/thaw.sh)					
+#                 Then run 'update-rc.d thaw.sh defaults' (no quotes)
+#          BUGS:  ---
+#         NOTES:  Inspired by:
+#                 http://www.linuxquestions.org/linux/answers/Applications_GUI_Multimedia/Deepfreeze_for_Linux
+#                 Runlevel info:
+#                 http://embraceubuntu.com/2005/09/07/adding-a-startup-script-to-be-run-at-bootup/		
+#        AUTHOR:  C Hawley 
+#       COMPANY:  
+#       VERSION:  1.0
+#       CREATED:  02/24/2011 12:18:55 PM EST
+#      REVISION: Mon 09 Oct 2017 05:16:19 PM EDT
+#===============================================================================
+
+set -o nounset                               # Treat unset variables as an error
+
+# Check for empty argument
+if [ -z "${1:-}" ]; then
+	arg="undefined"
+	echo "You must specify the username and archive location"
+	exit 1
+fi
+
+frozenuser="${1}"
+frozenarchive="${2}/${frozenuser}.frozen.tgz"
+
+# remove existing user directory
+rm -rf /home/"${frozenuser}"
+
+# extract user tarball
+# tar options:
+# -p extract all protection information
+# -P don't strip leading '/'s from file names
+tar -xpPf "${frozenarchive}" -C /