after making a backup of raspbian with tar. how to restore?

[must-be]

if i have a tar of a full system backup.
how can i restore the system in case of a failure?

[Heater]

Depends. How did you make the tar? A tar or what exactly?

[must-be]

i didin't made a tar file yet. i just saw some youtube about tar and cron and wondered to myself how it can be done (full restoration)

the file should be a .tar.gz file type..

and it should be stored locally.

[rpdom]

The easiest way to make a working backup of a Raspbian card is to get another card and a USB adapter for it, plug it into the Pi and run the SD Card copier. Then you will have a card that will have identical contents to your current card.

(If running Raspbian Lite, you will need to install piclone and run that from the command line).

[k-pi]

You only need backups of your data, the system can be re installed or upgraded.

So basically just create a .tar or .tar.gz of your own data, & store it away from your currently in use disk.

[must-be]

thanks you both
i will try the "copier" solution

i started the question tho both because of the interest of how to use tar in general and in copying the whole system

but also because i really want a backup of my raspbian.
i mess things up often and it is good not to need to install and configure from scrach