So everyone knows that you can now use the "Securely empty trash" feature. What if you want to remove a file but not use the Trash? The new feature in Panther is the command /usr/bin/srm. There are two other options that Secure empty trash doesn't use:
-m, --medium overwrite the file with 7 US DoD compliant passes (0xF6, 0x00, 0xFF, random, 0x00, 0xFF, random) -z, --zero after overwriting, zero blocks used by fileSo, srm -mz [filename] will do a DoD compliant erase and zero the data.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031025092806502