I have a system with dual boot (debian 8/ windows 8)
After i formatted a drive from windows 8 i'm unable to boot even from usb, always it says 'Unknown Filesystem'.

Now, I can only boot the linux by using grub commands like

set boot=(hd0,msdos1)
set prefix=(hd0,msdos1)/boot/grub
insmod normal

I've tried to format the drives after booting the debian 8, this way. But, still i can't get into the system without grub commands.

Now how can i boot from usb & install a new OS removing all the partitions ?

closed as off-topic by Kevin Bowen, Videonauth, David Foerster, Eric Carvalho, muru May 17 '16 at 0:33

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This is not about Ubuntu. Questions about other Linux distributions can be asked on Unix & Linux, those about Windows on Super User, those about Apple products on Ask Different and generic programming questions on Stack Overflow." – Kevin Bowen, Videonauth, David Foerster, Eric Carvalho, muru
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  • This is bordering on off topic, as it is not about Ubuntu... – Android Dev May 15 '16 at 16:13

After you successfully boot your debian, correct the grub configuration and install new grub. I have never used debian but I believe it is similar to Ubuntu, so sudo grub-install would probably be the right command, after you change the grub config files. Maybe take a look here Windows 10 upgrade led to grub rescue where is says how you correct Ubuntu grub configuration.


Your OS is Debian, not Ubuntu. Should ask your question here

OR ask your question on IRC: irc.debian.org on channel #debian

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