## How To Apply a Patch to Source Code

Learn by example:
Get a sourcecode package and a .diff.gz file and patch the source. The package is sane-backends_1.0.19.orig.tar.gz and the patch sane-backends_1.0.19-23ubuntu7.diff.gz:

cd ~/Downloads/

An important parameter of patch is -p. It can be used if you apply a patch in a subdirectory of the directory where it has been created. For more information have a look at the man page: man patch.