Hello @Hasin,
The Toradex Easy Installer can be used to install images in an automated way.
This can be done by setting the auto-install flag on an image in the Toradex Easy Installer format and making it available to the module, either via the network or via an SD card/USB drive.
You can see an example of the network setup here: Installing Image without User interaction - #2 by bruno.tx
As all modules are pre-installed with the Toradex Easy Installer, using it for programming devices is the intended and expected way to do it, including for a large number of devices.
Best Regards,
Bruno