How to recovery data from hard drive with account protected in Yosemite?

I run in an accidentally away, a command in terminal that erase all my data in hard drive...  
I try to backup all my data using a live CD from Ubuntu but no success... my data have the account protection...
Help me please!

try
mount -o remount,rw /
if that don't work you could be borked and you will need to restore the disk
If the data is gone you can try this.
Data Rescue for mac
http://www.prosofteng.com/datarescue4/

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