My suggestion is that:
Download Clonezilla live, select the following CPU architecture and file type.
Clonezilla site download
Install Tuxboot to copy Clonezilla to a USB stick.
sudo apt-add-repository ppa:thomas.tsai/ubuntu-tuxboot
sudo apt-get update
sudo apt-get install tuxboot
Once you get Tuxboot installed, use it to create your live bootable Clonezilla USB stick.
First create a FAT32 partition of at least 400 megabytes.
Then run Tuxboot, check Pre-downloaded and click the button with the ellipsis to select your Clonezilla file.
Boot up your Clonezilla USB stick on the computer that you want to backup, at the Start Clonezilla menu select Start Clonezilla.
In the next menu select device_image, then go to the next screen.
This is where you select the location for your backup image to be copied to.
An attached USB hard drive is a nice fast and easy option.
In the next screen you can choose savedisk, which creates an image of an entire hard disk, or save_parts.
After making your selections, the next screen gives you the option to do a filesystem check and repair.
Restoring your image is similar to creating it.
Again, boot up Clonezilla, go through the same initial steps, select dev_image, and then on the local_dev screen select the location of your image that you want to restore, whether it's on a local device or network share.
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