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Hey thanks for commenting guys, i really appreciate it.
i'm searching for the way to add a new start option in the menu of the grub loader, where the users choose the system that they want to use. up to now i have 2 start options, the regular one (devian os) and the recovery one (devian too), what im searching for is to add one new start option of devian (a copy of the original) to practice. i know that this can be created editing the grub.cfg file but no more. if you know the way to make it, please share your response with me, thanks.
again
what operating system are you using and what version
the version of the OS will help us to know WHAT VERSION OF GRUB you are using
the instructions for grub 2 are VERY VERY DIFFERENT than the instructions for grub legacy
If I understand correctly, you want to use Grub to start a "copy" of the installed Debian OS for practice in such a way that, if you break it, it won't affect the existing install.
That would be asking Grub to do something it's not designed to do. It can't boot a copy of an installed OS into a sandbox of some sort. You can created a second pointer to the existing Debian install, but it will still boot the existing OS, not a sandboxed copy of some sort.
If you have enough RAMs, the best way to set up something for practice is to create a Virtual Machine using VirtualBox or some other virtualizer. That way, if you break the VM, you can simply delete it and start over.
Alternatively, you make your computer dual-boot by installing a second OS, but a VM would be the best way to go.
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