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Comparing and Merging Files with GNU diff and patch
by David MacKenzie, Paul Eggert, and Richard Stallman
Paperback (6"x9"), 120 pages
ISBN 0954161750
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10.13 GNU patch and Traditional patch

The current version of GNU patch normally follows the POSIX standard. See section 10.12 patch and the POSIX Standard, for the few exceptions to this general rule.

Unfortunately, POSIX redefined the behavior of patch in several important ways. You should be aware of the following differences if you must interoperate with traditional patch, or with GNU patch version 2.1 and earlier.

ISBN 0954161750Comparing and Merging Files with GNU diff and patchSee the print edition