Debian Linux Kernel Handbook / Chapter 3. Debian kernel packages
Table of Contents
The linux source package supports building of kernel images and headers for all currently supported architectures. The linux-latest source package supports building of meta-packages that depend on them. The linux-signed source package supports building of signed kernel images and modules for some architectures. Subsequent sections of this chapter document the naming and contents of the binary packages built from these source packages.
version
This package contains the Debian kernel source tarball. Once the
package is installed, the source tarball is available at
/usr/src/linux-source-.
version.tar.xz
version
This package contains the manual pages for the functions, constituting the
kernel API. These pages are installed into
/usr/share/man/man9/, and are accessible with the standard
man command. Due to filename conflicts, only one
linux-manual package may be installed at any given time.
version
This package contains the rest of the kernel documentation in various formats.
It is installed in
/usr/share/doc/linux-doc-.
version
version-abinameThis package contains metadata from the linux source package that is needed to prepare and build the other source packages.
version-abiname-common[-featureset]
This package contains a common set of kernel headers for a particular
featureset (or no featureset). Together with the flavour-specific
linux-headers package it provides a full set of
kernel headers, suitable for building of out-of-tree modules. This
package should not normally be installed directly, but only as a
dependency of the flavour-specific headers package (see below). It
unpacks into the
/usr/src/linux-headers-
directory. Before version 4.9 these packages were
architecture-dependent.
version-abiname-common[-featureset]
The kind of hardware the particular kernel package is designed for is uniquely identified by the architecture, featureset, and flavour. Kernels for all architectures are built from the same Debian kernel source tree, which is obtained using the procedure described in Chapter 2, Debian kernel source. Each architecture usually has multiple flavours of the binary kernel images. Different flavours correspond to different kernel configuration files, used to build the binary images from the same kernel tree.
In order to build a working kernel with an extra featureset not provided by the
upstream source, additional changes to the Debian kernel source are required.
Again, multiple flavours of binary images may be built from the featureset
tree. For example, the i386 architecture has a number of
different flavours, such as 686 and
686-pae, built from the common Debian kernel source. It
also contains the rt featureset. The source tree for
building the kernels for each of these featuresets is obtained by applying
additional patches to the Debian kernel source. It may be used to build the
rt-686-pae binary image flavours. The names of the Debian
binary packages incorporate the name of the flavour and, if necessary, the name
of the featureset (there is no need to worry about the name of the
architecture, since Debian tools will only allow installation of the packages
with "correct" architecture). If the arch does not have any featuresets, the
featureset part is omitted from the name, as indicated by the square brackets
below.
Package names also include the abiname, a small integer, which identifies the kernel's binary compatibility level. The kernels with different abinames are binary incompatible, so upgrading to a kernel with a different abiname will most likely require recompilation of third-party binary modules against the new kernel. The list of architecture-dependent packages together with a short description is given below.
version-abiname[-featureset]-flavour
This package provides flavour-specific header files. It depends on the
corresponding
linux-headers-version-abiname-common[-featureset]
package, and sets up symbolic links into its directory tree in such a way that
the directory
/usr/src/linux-headers-
appears to contain a full set of headers, required for building of out-of-tree
kernel modules. For more information on this check out Section 4.4, “Out-of-tree kernel modules”. A complete set of kernel headers matching the
currently running official kernel may be installed with a command
version-abiname[-featureset]-flavour
apt-get install linux-headers-$(uname -r)
featureset]-flavourfeatureset]-flavourThese meta-packages provide (via dependencies) the latest binary image and matching set of header files (respectively) for a particular flavour. Example: linux-image-rt-686-pae
version-abiname[-featureset]-flavour
This package contains the binary kernel image and pre-built binary modules for
a particular arch/featureset/flavour combination. Names of the files installed
by this package are architecture-dependent. Typical locations of essential
files for the i386 architecture are:
/boot/vmlinuz-version-abiname[-featureset]-flavourThe binary (compressed) kernel image.
/boot/initrd.img-version-abiname[-featureset]-flavourInitial RAM filesystem (initramfs) image. Note, that this file is automatically generated in the installation process and is not shipped as a part of the package. See Chapter 7, Managing the initial ramfs (initramfs) archive for more details.
/boot/config-version-abiname[-featureset]-flavourThe kernel configuration file used to build this particular kernel. May be used to rebuild the kernel from source, if necessary.
/lib/modules/version-abiname[-featureset]-flavour/Directory containing the pre-built binary kernel modules.
version-abiname[-featureset]-flavour-unsignedThis package contains the binary kernel image and pre-built binary modules for a particular arch/featureset/flavour combination, that are meant to be signed and copied into a package without the -unsigned suffix. There is normally no need to install these packages.
This package provides Linux kernel headers for use by userspace programs, such as GNU glibc and other system libraries.