A primeira coisa a lembrar é - pare de fazer qualquer outra atividade de gravação no sistema de arquivos.
Depois, você pode experimentar algumas ferramentas que examinarão o sistema de arquivos e tentarão localizar os dados no nó excluído. ' extundelete
' é uma dessas ferramentas no sourceforge.
extundelete is a utility that can recover deleted files from an ext3 or ext4 partition. The ext3 file system is the most common file system when using Linux, and ext4 is its successor. extundelete uses the information stored in the partition's journal to attempt to recover a file that has been deleted from the partition. There is no guarantee that any particular file will be able to be undeleted, so always try to have a good backup system in place, or at least put one in place after recovering your files!