Ubuntu Desktop System Restore Point (Backup & Restore) Using Timeshift Application (Step by Step)

sudo apt update

sudo apt upgrade

Install and set up TimeShift on Ubuntu ( not encrypted)

1- Install TimeShift: 

sudo apt install timeshift

2- Run TimeShift, choose RSYNC if using a default Ubuntu installation (EXT4 file system)

3- Select a EXT4 formatted external drive. 

4- Select a schedule to create snapshots. Click finish.

5- Home directory backup. You will want to select /root Exclude All Files for most people. I recommend choosing Include Only Hidden Files (which saves browser history, Thunderbird email, and various user-level application configurations).

6- Next we'll want to take our first snapshot. Click the Create button in the upper left. 

Restore a snapshot

1- Select the restore point you want.

2-  Unless you know what you're doing here, stick the selected defaults.

3- It will start off with a dry run.

4- Next, confirm what your would like to restore. If unsure, leave it as is and press next.

5- Verify everything looks correct, triple check those partitions to make sure you making the right selections - if unsure, hit cancel now and check.

6- You will not see it go to a black screen with a ton of text on it. This will feel like a command line program is running, then it will reboot

https://www.youtube.com/watch?v=u-SjzXY67WM