How to restore data after linux can't boot

 

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                        How to restore data after ubuntu can't boot

1. If you have another system(ms windows), you can backup ubuntu file root.disk on a separate disk;

2. On some unexpected exception, your ubuntu can't boot;

3. Reinstall ubuntu;

4. Mount root.disk you has backed; (using cmd:"sudo mount -o loop/win/ubuntu/disks/root.disk /vdisk")

5. Using copy/paste commands to restore your data;