Today a User is forced to Update daily his System or change anything to try new Software.
But here mostly the Users run into very BAD PROBLEMS. I got often Calls that Users lose the control of the PC after Updates, Software Setups, Software Removal’s ..
For this Linux offers a default Backup Tool, called Diskdump („dd“ command) which is on every Setup/Recover CD and Installation.
Before any Changes do allways a Backup to USB Drives, Sticks or Second SATA Disk! This will save you TIME, Money, DATA and Nerves!
Mount the Disk 2 on Path /mnt as „root/sudo“ user (must have free Space like Disk 1 better more!)
then start Backup Disk 1 everything to Disk 2 as IMG Image, bs set the speed disk to disk 10MB/s is a secure value!
To Restore a damaged PC, plug your second Disk into the PC, boot from Setup CD, Press ALT-CTRL-F1 (or open Gnome-Terminal)
Mount the second Disk again on /mnt with „root/sudo“ User
and start the restore with dd from Disk 2 – IMG – Imagefile to Disk 1, enjoy a long coffee break…
After Command close without Errors or other Messages, reboot and go on working…
Remark: This is a Block to Block Backup and Restore, with Snapshots. These IMG Snapshots can be saved on Disks, moved over Network, burned to DVD or mounted like a DVD on other Linux Systems to access the Files for emergency!