How to restore data after linux can't boot

 

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                        How
to restore data after ubuntu can't boot
If you have another
system(ms windows), you can backup ubuntu file root.disk on a
separate disk;
On some unexpected
exception, your ubuntu can't boot;
Reinstall ubuntu;
Mount root.disk you has
backed; (using cmd:"sudo mount -o loop/win/ubuntu/disks/root.disk
/vdisk")
Using copy/paste commands
to restore your data;