The following How-To explains how to install and configure Lethe on Debian 8 Jessie. These instructions, with appropriate changes, will more than likely work with other distributions of Linux.
Once installed Lethe acts very similar to Faronics Deep Freeze. It freezes the selected partition(s) and upon reboot restores the partition to its previous state. Any changes made to the Operating System between reboots will be destroyed.
In the terminal type the following command to install lethe:
sudo dpkg -i lethe_0.34_all.deb
*Do not be alarmed by the error, we will address that in the following steps.
5). sudo chmod 777 /media/NameUser
6). Reboot and Test
Reboot your system and test out your frozen instances of Debian. If you wish to make permanent changes just boot into the instance of Debian on your grub menu that is not documented as frozen (or "freezed" if you didn't fix the grammatical error when in grub-customizer :-P ).
Conclusion
Lethe should now finish installing and make all of the appropriate entries in your Grub boot menu. One of the options will allow for booting into Debian unfrozen in case you need to make changes.
If you wish to secure the unfrozen boot option you can password protect Grub or remove that entry from the Grub boot menu.
I strongly urge you to not attempt installing this for the first time on production systems or systems with sensitive data. Mistakes made during installation could result in data loss and/or systems becoming unbootable.
Install Lethe on Ubuntu 14.04 LTS:
http://community.spiceworks.com/how_to/show/90188-install-lethe-on-ubuntu-14-04-lts
Install Lethe on Debian 8 Jessie:
The following How-To explains how to install and configure Lethe on Debian 8 Jessie. These instructions, with appropriate changes, will more than likely work with other distributions of Linux.
Once installed Lethe acts very similar to Faronics Deep Freeze. It freezes the selected partition(s) and upon reboot restores the partition to its previous state. Any changes made to the Operating System between reboots will be destroyed.
1). Download Lethe from Sourceforge
Open a terminal and type the following command:
sudo wget http://sourceforge.net/projects/lethe/files/latest/download/lethe_0.34_all.deb
2). Install aufs-tools
In the terminal type the following commands:
sudo apt-get update
sudo apt-get install aufs-tools
3). Copy file /usr/lib/grub/update-grub_lib (Debian 6 Squeeze) ---> /usr/lib/grub/update-grub_lib (Debian Jessie).
(attachments)
4). Install the lethe debian package
In the terminal type the following command to install lethe:
sudo dpkg -i lethe_0.34_all.deb
*Do not be alarmed by the error, we will address that in the following steps.
5). sudo chmod 777 /media/NameUser
6). Reboot and Test
Reboot your system and test out your frozen instances of Debian. If you wish to make permanent changes just boot into the instance of Debian on your grub menu that is not documented as frozen (or "freezed" if you didn't fix the grammatical error when in grub-customizer :-P ).
Conclusion
Lethe should now finish installing and make all of the appropriate entries in your Grub boot menu. One of the options will allow for booting into Debian unfrozen in case you need to make changes.
If you wish to secure the unfrozen boot option you can password protect Grub or remove that entry from the Grub boot menu.
I strongly urge you to not attempt installing this for the first time on production systems or systems with sensitive data. Mistakes made during installation could result in data loss and/or systems becoming unbootable.
Last edit: Nick 2014-12-24