AFAIK, the only way to do it would be to use something like debugfs - which has a command called lsdel, which can be used to search for deleted files. I've never used debugfs though - so you might want to do a few web-searches and look it up.
Debugfs can also be used to restore deleted files, but if the machine has been in use a lot since the hack/intrusion you mentioned in one of your other threads - it is possible that the space formerly occupied by deleted files has already been completely overwritten . So you might only get a partial list of deleted file-names, if anything at all.
Data recovery isn't something that I am skilled at, so Googling around may give you more/better solutions. One thing Google found was this article that describes using a program called testdisk. I installed it, and with some brief experimenting I see that it does show deleted files highlighted in red as shown in the article. But this program looks quite powerful and can do other things, so use it very carefully.
Also, the more time that passes, the less chance you have of finding deleted files. When new data is written to the same space on the hard drive, the deleted files will likely be lost forever.