How to Secure erase files in OS X without moving the files into trash?

My Question is I want to erase a file in OS X Securely (like the function of "Secure Empty Trash") so that, the file cannot be recovered by using recovery tools. I don't want to empty the trash. It is possible to erase Files Securely in OS X without moving the file to Trash ?

Solution 1:

You can always use the terminal command rm with the -P option:

[Option -P will] Overwrite regular files before deleting them. Files are overwritten three times, first with the byte pattern 0xff, then 0x00, and then 0xff again, before they are deleted.

If you're not handy with the Terminal, just:

1. Open the Terminal.app (Found in /Applications/Utilities).
2. Type cd and drag the folder which contains the file you want to delete, to the terminal window.
3. Type rm -P FileName.extension and hit Enter

Solution 2:

srm is another shell utility for deleting files securely. It uses the 35-pass Gutmann algorithm by default, but -s (overwriting files with random data once) is faster and should be secure enough for most purposes.

Solution 3:

If you want to make sure that your files, deleted or otherwise, cannot be recovered, just turn on FileVault to encrypt your disk.

Multiple erases or writes on SSDs do not make the file "more" erased.

(I realise this is an old question.)