patch

Apply diff files to original files.

$ patch

Diff file (-i)Original file

Output file (-o)Strip path levels (-p)

Examples

# Apply a diff file
patch -i fix.diff original.txt

# Apply with backup
patch -b -i fix.diff original.txt

# Reverse a patch
patch -R -i fix.diff original.txt

# Dry run to preview
patch --dry-run -i fix.diff original.txt

# Strip path levels
patch -p1 -i changes.diff

# Force apply
patch -f -i fix.diff original.txt