mac os x: secure delete, tar/gzip with resource fork

Discovered that on Mac Os X 10.6, tar, gzip, gunzip preserves resource fork by default. Updated at: Mac OS X Resource Fork and Command Line Tips.

Discovered that on the Mac, to securely delete files, just use the builtin command srm, like this: “srm -r -s dir_path”. For detail, see: Secure Deletion, File Shredding, on Windows, Linux, Mac.

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