How to recover a file?

Question

MySQL

Deleted the database file with the rm -fr /var/lib/mysql/ibdata1 command .
How can you restore? Maybe there are some programs?
Googled this thing: habrahabr.ru/post/55465
How effective is it?

Answer 1

testdisk helped me a lot

Answer 2

mass of options
0. make backups. everyday. All IT people are divided into 2 categories - those who make backups and those who NOW make backups.
1. if nothing was written to the disk after deletion, there is a chance. I provided a link to the utilities.

Answer 3

inefficient. file systems on Linux do not like recovery, especially if something has already been written to this disk, especially the recovery of large files