Name: sugarizer-school-box
Owner: Sugar Labs
Description: null
Created: 2018-05-18 20:59:33.0
Updated: 2018-05-18 21:35:27.0
Pushed: 2018-05-01 11:50:29.0
Homepage: null
Size: 35135
Language: Shell
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rpi23-gen-image.sh is an advanced Debian Linux bootstrapping shell script for generating Debian OS images for Raspberry Pi 2 (RPi2) and Raspberry Pi 3 (RPi3) computers. The script at this time supports the bootstrapping of the Debian (armhf) releases jessie, stretch and buster. Raspberry Pi 3 images are generated for 32-bit mode only. Raspberry Pi 3 64-bit images can be generated using custom configuration parameters (`templates/rpi3-stretch-arm64-4.11.y`).
The following list of Debian packages must be installed on the build system because they are essentially required for the bootstrapping process. The script will check if all required packages are installed and missing packages will be installed automatically if confirmed by the user.
s recommended to configure the `rpi23-gen-image.sh` script to build and install the latest Raspberry Pi Linux kernel. For the RPi3 this is mandatory. Kernel compilation and linking will be performed on the build system using an ARM (armhf) cross-compiler toolchain.
script has been tested using the default `crossbuild-essential-armhf` toolchain meta package on Debian Linux `jessie` and `stretch` build systems. Please check the [Debian CrossToolchains Wiki](https://wiki.debian.org/CrossToolchains) for further information.
Debian Linux `jessie` build system is used it will be required to add the [Debian Cross-toolchains repository](http://emdebian.org/tools/debian/) first:
echo “deb http://emdebian.org/tools/debian/ jessie main” > /etc/apt/sources.list.d/crosstools.list sudo -u nobody wget -O - http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add - dpkg –add-architecture armhf apt-get update
ommand-line parameters
script accepts certain command-line parameters to enable or disable specific OS features, services and configuration settings. These parameters are passed to the `rpi23-gen-image.sh` script via (simple) shell-variables. Unlike environment shell-variables (simple) shell-variables are defined at the beginning of the command-line call of the `rpi23-gen-image.sh` script.
# Command-line examples:
ENABLE_UBOOT=true ./rpi23-gen-image.sh ENABLE_CONSOLE=false ENABLE_IPV6=false ./rpi23-gen-image.sh ENABLE_WM=xfce4 ENABLE_FBTURBO=true ENABLE_MINBASE=true ./rpi23-gen-image.sh ENABLE_HARDNET=true ENABLE_IPTABLES=true /rpi23-gen-image.sh APT_SERVER=ftp.de.debian.org APT_PROXY=“http://127.0.0.1:3142/” ./rpi23-gen-image.sh ENABLE_MINBASE=true ./rpi23-gen-image.sh BUILD_KERNEL=true ENABLE_MINBASE=true ENABLE_IPV6=false ./rpi23-gen-image.sh BUILD_KERNEL=true KERNELSRC_DIR=/tmp/linux ./rpi23-gen-image.sh ENABLE_MINBASE=true ENABLE_REDUCE=true ENABLE_MINGPU=true BUILD_KERNEL=true ./rpi23-gen-image.sh ENABLE_CRYPTFS=true CRYPTFS_PASSWORD=changeme EXPANDROOT=false ENABLE_MINBASE=true ENABLE_REDUCE=true ENABLE_MINGPU=true BUILD_KERNEL=true ./rpi23-gen-image.sh RELEASE=stretch BUILD_KERNEL=true ./rpi23-gen-image.sh RPI_MODEL=3 ENABLE_WIRELESS=true ENABLE_MINBASE=true BUILD_KERNEL=true ./rpi23-gen-image.sh RELEASE=stretch RPI_MODEL=3 ENABLE_WIRELESS=true ENABLE_MINBASE=true BUILD_KERNEL=true ./rpi23-gen-image.sh
onfiguration template files
void long lists of command-line parameters and to help to store the favourite parameter configurations the `rpi23-gen-image.sh` script supports so called configuration template files (`CONFIG_TEMPLATE`=template). These are simple text files located in the `./templates` directory that contain the list of configuration parameters that will be used. New configuration template files can be added to the `./templates` directory.
# Command-line examples:
CONFIG_TEMPLATE=rpi3stretch ./rpi23-gen-image.sh CONFIG_TEMPLATE=rpi2stretch ./rpi23-gen-image.sh
upported parameters and settings
APT settings:
# `APT_SERVER`="ftp.debian.org"
Debian packages server address. Choose a server from the list of Debian worldwide [mirror sites](https://www.debian.org/mirror/list). Using a nearby server will probably speed-up all required downloads within the bootstrapping process.
# `APT_PROXY`=""
Proxy server address. Using a local Proxy-Cache like `apt-cacher-ng` will speed-up the bootstrapping process because all required Debian packages will only be downloaded from the Debian mirror site once.
# `APT_INCLUDES`=""
mma separated list of additional packages to be installed by debootstrap during bootstrapping.
# `APT_INCLUDES_LATE`=""
mma separated list of additional packages to be installed by apt after bootstrapping and after APT sources are set up. This is useful for packages with pre-depends, which debootstrap do not handle well.
General system settings:
# `RPI_MODEL`=2
ifiy the target Raspberry Pi hardware model. The script at this time supports the Raspberry Pi models `2` and `3`. `BUILD_KERNEL`=true will automatically be set if the Raspberry Pi model `3` is used.
# `RELEASE`="jessie"
the desired Debian release name. The script at this time supports the bootstrapping of the Debian releases "jessie", "stretch" and "buster". `BUILD_KERNEL`=true will automatically be set if the Debian releases `stretch` or `buster` are used.
# `RELEASE_ARCH`="armhf"
the desired Debian release architecture.
# `HOSTNAME`="rpi$RPI_MODEL-$RELEASE"
system host name. It's recommended that the host name is unique in the corresponding subnet.
# `PASSWORD`="raspberry"
system `root` password. It's **STRONGLY** recommended that you choose a custom password.
# `USER_PASSWORD`="raspberry"
password for the created non-root user `USER_NAME`=pi. Ignored if `ENABLE_USER`=false. It's **STRONGLY** recommended that you choose a custom password.
# `DEFLOCAL`="en_US.UTF-8"
default system locale. This setting can also be changed inside the running OS using the `dpkg-reconfigure locales` command. Please note that on using this parameter the script will automatically install the required packages `locales`, `keyboard-configuration` and `console-setup`.
# `TIMEZONE`="Europe/Berlin"
default system timezone. All available timezones can be found in the `/usr/share/zoneinfo/` directory. This setting can also be changed inside the running OS using the `dpkg-reconfigure tzdata` command.
# `EXPANDROOT`=true
nd the root partition and filesystem automatically on first boot.
Keyboard settings:
e options are used to configure keyboard layout in `/etc/default/keyboard` for console and Xorg. These settings can also be changed inside the running OS using the `dpkg-reconfigure keyboard-configuration` command.
# `XKB_MODEL`=""
the name of the model of your keyboard type.
# `XKB_LAYOUT`=""
the supported keyboard layout(s).
# `XKB_VARIANT`=""
the supported variant(s) of the keyboard layout(s).
# `XKB_OPTIONS`=""
extra xkb configuration options.
Networking settings (DHCP):
parameter is used to set up networking auto configuration in `/etc/systemd/network/eth.network`. The default location of network configuration files in the Debian `stretch` release was changed to `/lib/systemd/network`.`
# `ENABLE_DHCP`=true
the system to use DHCP. This requires an DHCP server.
Networking settings (static):
e parameters are used to set up a static networking configuration in `/etc/systemd/network/eth.network`. The following static networking parameters are only supported if `ENABLE_DHCP` was set to `false`. The default location of network configuration files in the Debian `stretch` release was changed to `/lib/systemd/network`.
# `NET_ADDRESS`=""
a static IPv4 or IPv6 address and its prefix, separated by "/", eg. "192.169.0.3/24".
# `NET_GATEWAY`=""
the IP address for the default gateway.
# `NET_DNS_1`=""
the IP address for the first DNS server.
# `NET_DNS_2`=""
the IP address for the second DNS server.
# `NET_DNS_DOMAINS`=""
the default DNS search domains to use for non fully qualified host names.
# `NET_NTP_1`=""
the IP address for the first NTP server.
# `NET_NTP_2`=""
the IP address for the second NTP server.
Basic system features:
# `ENABLE_CONSOLE`=true
le serial console interface. Recommended if no monitor or keyboard is connected to the RPi2/3. In case of problems fe. if the network (auto) configuration failed - the serial console can be used to access the system.
# `ENABLE_I2C`=false
le I2C interface on the RPi2/3. Please check the [RPi2/3 pinout diagrams](http://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
# `ENABLE_SPI`=false
le SPI interface on the RPi2/3. Please check the [RPi2/3 pinout diagrams](http://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
# `ENABLE_IPV6`=true
le IPv6 support. The network interface configuration is managed via systemd-networkd.
# `ENABLE_SSHD`=true
all and enable OpenSSH service. The default configuration of the service doesn't allow `root` to login. Please use the user `pi` instead and `su -` or `sudo` to execute commands as root.
# `ENABLE_NONFREE`=false
w the installation of non-free Debian packages that do not comply with the DFSG. This is required to install closed-source firmware binary blobs.
# `ENABLE_WIRELESS`=false
load and install the [closed-source firmware binary blob](https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm) that is required to run the internal wireless interface of the Raspberry Pi model `3`. This parameter is ignored if the specified `RPI_MODEL` is not `3`.
# `ENABLE_RSYSLOG`=true
et to false, disable and uninstall rsyslog (so logs will be available only
ournal files)
# `ENABLE_SOUND`=true
le sound hardware and install Advanced Linux Sound Architecture.
# `ENABLE_HWRANDOM`=true
le Hardware Random Number Generator. Strong random numbers are important for most network based communications that use encryption. It's recommended to be enabled.
# `ENABLE_MINGPU`=false
mize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.
# `ENABLE_DBUS`=true
all and enable D-Bus message bus. Please note that systemd should work without D-bus but it's recommended to be enabled.
# `ENABLE_XORG`=false
all Xorg open-source X Window System.
# `ENABLE_WM`=""
all a user defined window manager for the X Window System. To make sure all X related package dependencies are getting installed `ENABLE_XORG` will automatically get enabled if `ENABLE_WM` is used. The `rpi23-gen-image.sh` script has been tested with the following list of window managers: `blackbox`, `openbox`, `fluxbox`, `jwm`, `dwm`, `xfce4`, `awesome`.
Advanced system features:
# `ENABLE_MINBASE`=false
debootstrap script variant `minbase` which only includes essential packages and apt. This will reduce the disk usage by about 65 MB.
# `ENABLE_REDUCE`=false
ce the disk space usage by deleting packages and files. See `REDUCE_*` parameters for detailed information.
# `ENABLE_UBOOT`=false
ace the default RPi2/3 second stage bootloader (bootcode.bin) with [U-Boot bootloader](http://git.denx.de/?p=u-boot.git;a=summary). U-Boot can boot images via the network using the BOOTP/TFTP protocol.
# `UBOOTSRC_DIR`=""
to a directory (`u-boot`) of [U-Boot bootloader sources](http://git.denx.de/?p=u-boot.git;a=summary) that will be copied, configured, build and installed inside the chroot.
# `ENABLE_FBTURBO`=false
all and enable the [hardware accelerated Xorg video driver](https://github.com/ssvb/xf86-video-fbturbo) `fbturbo`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.
# `FBTURBOSRC_DIR`=""
to a directory (`xf86-video-fbturbo`) of [hardware accelerated Xorg video driver sources](https://github.com/ssvb/xf86-video-fbturbo) that will be copied, configured, build and installed inside the chroot.
# `ENABLE_IPTABLES`=false
le iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.
# `ENABLE_USER`=true
te non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, username will be `pi`.
# `USER_NAME`=pi
root user to create. Ignored if `ENABLE_USER`=false
# `ENABLE_ROOT`=false
root user password so root login will be enabled
# `ENABLE_HARDNET`=false
le IPv4/IPv6 network stack hardening settings.
# `ENABLE_SPLITFS`=false
le having root partition on an USB drive by creating two image files: one for the `/boot/firmware` mount point, and another for `/`.
# `CHROOT_SCRIPTS`=""
to a directory with scripts that should be run in the chroot before the image is finally built. Every executable file in this directory is run in lexicographical order.
# `ENABLE_INITRAMFS`=false
te an initramfs that that will be loaded during the Linux startup process. `ENABLE_INITRAMFS` will automatically get enabled if `ENABLE_CRYPTFS`=true. This parameter will be ignored if `BUILD_KERNEL`=false.
# `ENABLE_IFNAMES`=true
le automatic assignment of predictable, stable network interface names for all local Ethernet, WLAN interfaces. This might create complex and long interface names. This parameter is only supported if the Debian releases `stretch` or `buster` are used.
# `DISABLE_UNDERVOLT_WARNINGS`=
ble RPi2/3 under-voltage warnings and overlays. Setting the parameter to `1` will disable the warning overlay. Setting it to `2` will additionally allow RPi2/3 turbo mode when low-voltage is present.
SSH settings:
# `SSH_ENABLE_ROOT`=false
le password root login via SSH. This may be a security risk with default password, use only in trusted environments. `ENABLE_ROOT` must be set to `true`.
# `SSH_DISABLE_PASSWORD_AUTH`=false
ble password based SSH authentication. Only public key based SSH (v2) authentication will be supported.
# `SSH_LIMIT_USERS`=false
t the users that are allowed to login via SSH. Only allow user `USER_NAME`=pi and root if `SSH_ENABLE_ROOT`=true to login. This parameter will be ignored if `dropbear` SSH is used (`REDUCE_SSHD`=true).
# `SSH_ROOT_PUB_KEY`=""
SSH (v2) public key(s) from specified file to `authorized_keys` file to enable public key based SSH (v2) authentication of user `root`. The specified file can also contain multiple SSH (v2) public keys. SSH protocol version 1 is not supported. `ENABLE_ROOT` **and** `SSH_ENABLE_ROOT` must be set to `true`.
# `SSH_USER_PUB_KEY`=""
SSH (v2) public key(s) from specified file to `authorized_keys` file to enable public key based SSH (v2) authentication of user `USER_NAME`=pi. The specified file can also contain multiple SSH (v2) public keys. SSH protocol version 1 is not supported.
Kernel compilation:
# `BUILD_KERNEL`=false
d and install the latest RPi2/3 Linux kernel. Currently only the default RPi2/3 kernel configuration is used. `BUILD_KERNEL`=true will automatically be set if the Raspberry Pi model `3` is used.
# `CROSS_COMPILE`="arm-linux-gnueabihf-"
sets the cross compile enviornment for the compiler.
# `KERNEL_ARCH`="arm"
sets the kernel architecture for the compiler.
# `KERNEL_IMAGE`="kernel7.img"
of the image file in the boot partition. If not set, `KERNEL_IMAGE` will be set to "kernel8.img" automatically if building for arm64.
# `KERNEL_BRANCH`=""
of the requested branch from the GIT location for the RPi Kernel. Default is using the current default branch from the GIT site.
# `QEMU_BINARY`="/usr/bin/qemu-arm-static"
the QEMU enviornment for the Debian archive. If not set, `QEMU_BINARY` will be set to "/usr/bin/qemu-aarch64-static" automatically if building for arm64.
# `KERNEL_DEFCONFIG`="bcm2709_defconfig"
the default config for kernel compiling. If not set, `KERNEL_DEFCONFIG` will be set to "bcmrpi3\_defconfig" automatically if building for arm64.
# `KERNEL_REDUCE`=false
ce the size of the generated kernel by removing unwanted device, network and filesystem drivers (experimental).
# `KERNEL_THREADS`=1
er of parallel kernel building threads. If the parameter is left untouched the script will automatically determine the number of CPU cores to set the number of parallel threads to speed the kernel compilation.
# `KERNEL_HEADERS`=true
all kernel headers with built kernel.
# `KERNEL_MENUCONFIG`=false
t `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.
# `KERNEL_REMOVESRC`=true
ve all kernel sources from the generated OS image after it was built and installed.
# `KERNELSRC_DIR`=""
to a directory (`linux`) of [RaspberryPi Linux kernel sources](https://github.com/raspberrypi/linux) that will be copied, configured, build and installed inside the chroot.
# `KERNELSRC_CLEAN`=false
n the existing kernel sources directory `KERNELSRC_DIR` (using `make mrproper`) after it was copied to the chroot and before the compilation of the kernel has started. This parameter will be ignored if no `KERNELSRC_DIR` was specified or if `KERNELSRC_PREBUILT`=true.
# `KERNELSRC_CONFIG`=true
`make bcm2709_defconfig` (and optional `make menuconfig`) to configure the kernel sources before building. This parameter is automatically set to `true` if no existing kernel sources directory was specified using `KERNELSRC_DIR`. This parameter is ignored if `KERNELSRC_PREBUILT`=true.
# `KERNELSRC_USRCONFIG`=""
own config file to kernel `.config`. If `KERNEL_MENUCONFIG`=true then running after copy.
# `KERNELSRC_PREBUILT`=false
this parameter set to true the script expects the existing kernel sources directory to be already successfully cross-compiled. The parameters `KERNELSRC_CLEAN`, `KERNELSRC_CONFIG`, `KERNELSRC_USRCONFIG` and `KERNEL_MENUCONFIG` are ignored and no kernel compilation tasks are performed.
# `RPI_FIRMWARE_DIR`=""
directory (`firmware`) containing a local copy of the firmware from the [RaspberryPi firmware project](https://github.com/raspberrypi/firmware). Default is to download the latest firmware directly from the project.
Reduce disk usage:
following list of parameters is ignored if `ENABLE_REDUCE`=false.
# `REDUCE_APT`=true
igure APT to use compressed package repository lists and no package caching files.
# `REDUCE_DOC`=true
ve all doc files (harsh). Configure APT to not include doc files on future `apt-get` package installations.
# `REDUCE_MAN`=true
ve all man pages and info files (harsh). Configure APT to not include man pages on future `apt-get` package installations.
# `REDUCE_VIM`=false
ace `vim-tiny` package by `levee` a tiny vim clone.
# `REDUCE_BASH`=false
ve `bash` package and switch to `dash` shell (experimental).
# `REDUCE_HWDB`=true
ve PCI related hwdb files (experimental).
# `REDUCE_SSHD`=true
ace `openssh-server` with `dropbear`.
# `REDUCE_LOCALE`=true
ve all `locale` translation files.
Encrypted root partition:
# `ENABLE_CRYPTFS`=false
le full system encryption with dm-crypt. Setup a fully LUKS encrypted root partition (aes-xts-plain64:sha512) and generate required initramfs. The /boot directory will not be encrypted. This parameter will be ignored if `BUILD_KERNEL`=false. `ENABLE_CRYPTFS` is experimental. SSH-to-initramfs is currently not supported but will be soon - feel free to help.
# `CRYPTFS_PASSWORD`=""
password of the encrypted root partition. This parameter is mandatory if `ENABLE_CRYPTFS`=true.
# `CRYPTFS_MAPPING`="secure"
name of dm-crypt managed device-mapper mapping.
# `CRYPTFS_CIPHER`="aes-xts-plain64:sha512"
cipher specification string. `aes-xts*` ciphers are strongly recommended.
# `CRYPTFS_XTSKEYSIZE`=512
key size in bits. The argument has to be a multiple of 8.
Build settings:
# `BASEDIR`=$(pwd)/images/${RELEASE}
a path to a working directory used by the script to generate an image.
# `IMAGE_NAME`=${BASEDIR}/${DATE}-${KERNEL_ARCH}-${KERNEL_BRANCH}-rpi${RPI_MODEL}-${RELEASE}-${RELEASE_ARCH}
a filename for the output file(s). Note: the script will create $IMAGE_NAME.img if `ENABLE_SPLITFS`=false or $IMAGE_NAME-frmw.img and $IMAGE_NAME-root.img if `ENABLE_SPLITFS`=true. Note 2: If the KERNEL_BRANCH is not set, the word "CURRENT" is used.
nderstanding the script
functions of this script that are required for the different stages of the bootstrapping are split up into single files located inside the `bootstrap.d` directory. During the bootstrapping every script in this directory gets executed in lexicographical order:
ript | Description |
- | --- |
0-bootstrap.sh` | Debootstrap basic system |
1-apt.sh` | Setup APT repositories |
2-locale.sh` | Setup Locales and keyboard settings |
3-kernel.sh` | Build and install RPi2/3 Kernel |
4-fstab.sh` | Setup fstab and initramfs |
5-rpi-config.sh` | Setup RPi2/3 config and cmdline |
0-networking.sh` | Setup Networking |
1-firewall.sh` | Setup Firewall |
0-security.sh` | Setup Users and Security settings |
1-logging.sh` | Setup Logging |
2-sshd.sh` | Setup SSH and public keys |
1-uboot.sh` | Build and Setup U-Boot |
2-fbturbo.sh` | Build and Setup fbturbo Xorg driver |
0-firstboot.sh` | First boot actions |
9-reduce.sh` | Reduce the disk space usage |
the required configuration files that will be copied to the generated OS image are located inside the `files` directory. It is not recommended to modify these configuration files manually.
rectory | Description |
- | --- |
pt` | APT management configuration files |
oot` | Boot and RPi2/3 configuration files |
pkg` | Package Manager configuration |
tc` | Configuration files and rc scripts |
irstboot` | Scripts that get executed on first boot |
nitramfs` | Initramfs scripts |
ptables` | Firewall configuration files |
ocales` | Locales configuration |
odules` | Kernel Modules configuration |
ount` | Fstab configuration |
etwork` | Networking configuration files |
ysctl.d` | Swapping and Network Hardening configuration |
org` | fbturbo Xorg driver configuration |
ustom packages and scripts
an custom packages, i.e. those not in the debian repositories, can be installed by placing them in the `packages` directory. They are installed immediately after packages from the repositories are installed. Any dependencies listed in the custom packages will be downloaded automatically from the repositories. Do not list these custom packages in `APT_INCLUDES`.
pts in the custom.d directory will be executed after all other installation is complete but before the image is created.
ogging of the bootstrapping process
information related to the bootstrapping process and the commands executed by the `rpi23-gen-image.sh` script can easily be saved into a logfile. The common shell command `script` can be used for this purpose:
script -c 'APT_SERVER=ftp.de.debian.org ./rpi23-gen-image.sh' ./build.log
lashing the image file
r the image file was successfully created by the `rpi23-gen-image.sh` script it can be copied to the microSD card that will be used by the RPi2/3 computer. This can be performed by using the tools `bmaptool` or `dd`. Using `bmaptool` will probably speed-up the copy process because `bmaptool` copies more wisely than `dd`.
# Flashing examples:
bmaptool copy ./images/jessie/2017-01-23-rpi3-jessie.img /dev/mmcblk0 dd bs=4M if=./images/jessie/2017-01-23-rpi3-jessie.img of=/dev/mmcblk0
ou have set `ENABLE_SPLITFS`, copy the `-frmw` image on the microSD card, then the `-root` one on the USB drive:
bmaptool copy ./images/jessie/2017-01-23-rpi3-jessie-frmw.img /dev/mmcblk0 bmaptool copy ./images/jessie/2017-01-23-rpi3-jessie-root.img /dev/sdc
eekly image builds
image files are provided by JRWR'S I/O PORT and are built once a Sunday at midnight UTC!
ebian Stretch Raspberry Pi2/3 Weekly Image Builds](https://jrwr.io/doku.php?id=projects:debianpi)
xternal links and references
ebian worldwide mirror sites](https://www.debian.org/mirror/list)
ebian Raspberry Pi 2 Wiki](https://wiki.debian.org/RaspberryPi2)
ebian CrossToolchains Wiki](https://wiki.debian.org/CrossToolchains)
fficial Raspberry Pi Firmware on github](https://github.com/raspberrypi/firmware)
fficial Raspberry Pi Kernel on github](https://github.com/raspberrypi/linux)
-BOOT git repository](http://git.denx.de/?p=u-boot.git;a=summary)
org DDX driver fbturbo](https://github.com/ssvb/xf86-video-fbturbo)
Pi3 Wireless interface firmware](https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm)
ollabora RPi2 Kernel precompiled](https://repositories.collabora.co.uk/debian/)