gbp: add page (#7216)

pages/linux/gbp.md

@@ -0,0 +1,24 @@
+# gbp
+
+> A system to integrate the Debian package build system with Git.
+> More information: <http://honk.sigxcpu.org/projects/git-buildpackage/manual-html/gbp.html>.
+
+- Convert an existing Debian package to gbp:
+
+`gbp import-dsc {{path/to/package.dsc}}`
+
+- Build the package in the current directory using the default builder (`debuild`):
+
+`gbp buildpackage -jauto -us -uc`
+
+- Build a package in a `pbuilder` environment for Debian Bullseye:
+
+`DIST={{bullseye}} ARCH={{amd64}} gbp buildpackage -jauto -us -uc --git-builder={{git-pbuilder}}`
+
+- Specify a package to be a source-only upload in the `.changes` file (see https://wiki.debian.org/SourceOnlyUpload):
+
+`gbp buildpackage -jauto -us -uc --changes-options={{-S}}`
+
+- Import a new upstream release:
+
+`gbp import-orig --pristine-tar {{path/to/package.tar.gz}}`