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Guide to patch - diff (How to use patch)
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| # Create a patch file | |
| diff -u file.old file.new > file.patch | |
| # Apply a patch | |
| patch < file.patch | |
| # Create a backup before applying patch | |
| patch -b < file.patch | |
| # Create a versioned backup before applying patch | |
| # Note: numbered is the mechanism -V uses, not free input | |
| patch -b -V numbered < file.patch | |
| # Validate patch without applying | |
| patch --dry-run < file.patch | |
| # Reverse patch (undo) | |
| patch -R file.old < file.patch |
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