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1 1 # rpi23-gen-image
2 2 ## Introduction
3 3 `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` and `stretch`. Raspberry Pi 3 images are currently generated for 32-bit mode only.
4 4
5 5 ## Build dependencies
6 6 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.
7 7
8 8 ```debootstrap debian-archive-keyring qemu-user-static binfmt-support dosfstools rsync bmap-tools whois git bc psmisc```
9 9
10 10 It is recommended to configure the `rpi23-gen-image.sh` script to build and install the latest Raspberry Pi Linux kernel. For the RPi3 this is mandetory. Kernel compilation and linking will be performed on the build system using an ARM (armhf) cross-compiler toolchain.
11 11
12 12 The 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.
13 13
14 14 If a Debian Linux `jessie` build system is used it will be required to add the [Debian Cross-toolchains repository](http://emdebian.org/tools/debian/) first:
15 15
16 16 ```
17 17 echo "deb http://emdebian.org/tools/debian/ jessie main" > /etc/apt/sources.list.d/crosstools.list
18 18 sudo -u nobody wget -O - http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add -
19 19 dpkg --add-architecture armhf
20 20 apt-get update
21 21 ```
22 22
23 23 ## Command-line parameters
24 24 The 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.
25 25
26 26 #####Command-line examples:
27 27 ```shell
28 28 ENABLE_UBOOT=true ./rpi23-gen-image.sh
29 29 ENABLE_CONSOLE=false ENABLE_IPV6=false ./rpi23-gen-image.sh
30 30 ENABLE_WM=xfce4 ENABLE_FBTURBO=true ENABLE_MINBASE=true ./rpi23-gen-image.sh
31 31 ENABLE_HARDNET=true ENABLE_IPTABLES=true /rpi23-gen-image.sh
32 32 APT_SERVER=ftp.de.debian.org APT_PROXY="http://127.0.0.1:3142/" ./rpi23-gen-image.sh
33 33 ENABLE_MINBASE=true ./rpi23-gen-image.sh
34 34 BUILD_KERNEL=true ENABLE_MINBASE=true ENABLE_IPV6=false ./rpi23-gen-image.sh
35 35 BUILD_KERNEL=true KERNELSRC_DIR=/tmp/linux ./rpi23-gen-image.sh
36 36 ENABLE_MINBASE=true ENABLE_REDUCE=true ENABLE_MINGPU=true BUILD_KERNEL=true ./rpi23-gen-image.sh
37 37 ENABLE_CRYPTFS=true CRYPTFS_PASSWORD=changeme EXPANDROOT=false ENABLE_MINBASE=true ENABLE_REDUCE=true ENABLE_MINGPU=true BUILD_KERNEL=true ./rpi23-gen-image.sh
38 38 RELEASE=stretch BUILD_KERNEL=true ./rpi23-gen-image.sh
39 39 RPI_MODEL=3 ENABLE_WIRELESS=true ENABLE_MINBASE=true BUILD_KERNEL=true ./rpi23-gen-image.sh
40 40 RELEASE=stretch RPI_MODEL=3 ENABLE_WIRELESS=true ENABLE_MINBASE=true BUILD_KERNEL=true ./rpi23-gen-image.sh
41 41 ```
42 42
43 43 ## Configuration template files
44 44 To avoid 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.
45 45
46 46 #####Command-line examples:
47 47 ```shell
48 48 CONFIG_TEMPLATE=rpi3stretch ./rpi23-gen-image.sh
49 49 CONFIG_TEMPLATE=rpi2stretch ./rpi23-gen-image.sh
50 50 ```
51 51
52 52 ## Supported parameters and settings
53 53 #### APT settings:
54 54 ##### `APT_SERVER`="ftp.debian.org"
55 55 Set 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.
56 56
57 57 ##### `APT_PROXY`=""
58 58 Set 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.
59 59
60 60 ##### `APT_INCLUDES`=""
61 61 A comma separated list of additional packages to be installed during bootstrapping.
62 62
63 63 #### General system settings:
64 64 ##### `RPI_MODEL`=2
65 65 Specifiy 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.
66 66
67 67 ##### `RELEASE`="jessie"
68 68 Set the desired Debian release name. The script at this time supports the bootstrapping of the Debian releases "jessie" and "stretch". `BUILD_KERNEL`=true will automatically be set if the Debian release `stretch` is used.
69 69
70 70 ##### `HOSTNAME`="rpi$RPI_MODEL-$RELEASE"
71 71 Set system host name. It's recommended that the host name is unique in the corresponding subnet.
72 72
73 73 ##### `PASSWORD`="raspberry"
74 74 Set system `root` password. It's **STRONGLY** recommended that you choose a custom password.
75 75
76 76 ##### `USER_PASSWORD`="raspberry"
77 77 Set 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.
78 78
79 79 ##### `DEFLOCAL`="en_US.UTF-8"
80 80 Set 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`.
81 81
82 82 ##### `TIMEZONE`="Europe/Berlin"
83 83 Set 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.
84 84
85 85 ##### `EXPANDROOT`=true
86 86 Expand the root partition and filesystem automatically on first boot.
87 87
88 88 #### Keyboard settings:
89 89 These 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.
90 90
91 91 ##### `XKB_MODEL`=""
92 92 Set the name of the model of your keyboard type.
93 93
94 94 ##### `XKB_LAYOUT`=""
95 95 Set the supported keyboard layout(s).
96 96
97 97 ##### `XKB_VARIANT`=""
98 98 Set the supported variant(s) of the keyboard layout(s).
99 99
100 100 ##### `XKB_OPTIONS`=""
101 101 Set extra xkb configuration options.
102 102
103 103 #### Networking settings (DHCP):
104 104 This 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`.`
105 105
106 106 #####`ENABLE_DHCP`=true
107 107 Set the system to use DHCP. This requires an DHCP server.
108 108
109 109 #### Networking settings (static):
110 110 These 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`.
111 111
112 112 #####`NET_ADDRESS`=""
113 113 Set a static IPv4 or IPv6 address and its prefix, separated by "/", eg. "192.169.0.3/24".
114 114
115 115 #####`NET_GATEWAY`=""
116 116 Set the IP address for the default gateway.
117 117
118 118 #####`NET_DNS_1`=""
119 119 Set the IP address for the first DNS server.
120 120
121 121 #####`NET_DNS_2`=""
122 122 Set the IP address for the second DNS server.
123 123
124 124 #####`NET_DNS_DOMAINS`=""
125 125 Set the default DNS search domains to use for non fully qualified host names.
126 126
127 127 #####`NET_NTP_1`=""
128 128 Set the IP address for the first NTP server.
129 129
130 130 #####`NET_NTP_2`=""
131 131 Set the IP address for the second NTP server.
132 132
133 133 #### Basic system features:
134 134 ##### `ENABLE_CONSOLE`=true
135 135 Enable 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.
136 136
137 137 ##### `ENABLE_I2C`=false
138 138 Enable 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.
139 139
140 140 ##### `ENABLE_SPI`=false
141 141 Enable 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.
142 142
143 143 ##### `ENABLE_IPV6`=true
144 144 Enable IPv6 support. The network interface configuration is managed via systemd-networkd.
145 145
146 146 ##### `ENABLE_SSHD`=true
147 147 Install 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.
148 148
149 149 ##### `ENABLE_NONFREE`=false
150 150 Allow the installation of non-free Debian packages that do not comply with the DFSG. This is required to install closed-source firmware binary blobs.
151 151
152 152 ##### `ENABLE_WIRELESS`=false
153 153 Download 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`.
154 154
155 155 ##### `ENABLE_RSYSLOG`=true
156 156 If set to false, disable and uninstall rsyslog (so logs will be available only
157 157 in journal files)
158 158
159 159 ##### `ENABLE_SOUND`=true
160 160 Enable sound hardware and install Advanced Linux Sound Architecture.
161 161
162 162 ##### `ENABLE_HWRANDOM`=true
163 163 Enable Hardware Random Number Generator. Strong random numbers are important for most network based communications that use encryption. It's recommended to be enabled.
164 164
165 165 ##### `ENABLE_MINGPU`=false
166 166 Minimize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.
167 167
168 168 ##### `ENABLE_DBUS`=true
169 169 Install and enable D-Bus message bus. Please note that systemd should work without D-bus but it's recommended to be enabled.
170 170
171 171 ##### `ENABLE_XORG`=false
172 172 Install Xorg open-source X Window System.
173 173
174 174 ##### `ENABLE_WM`=""
175 175 Install 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`.
176 176
177 177 #### Advanced system features:
178 178 ##### `ENABLE_MINBASE`=false
179 179 Use debootstrap script variant `minbase` which only includes essential packages and apt. This will reduce the disk usage by about 65 MB.
180 180
181 181 ##### `ENABLE_REDUCE`=false
182 182 Reduce the disk space usage by deleting packages and files. See `REDUCE_*` parameters for detailed information.
183 183
184 184 ##### `ENABLE_UBOOT`=false
185 185 Replace 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.
186 186
187 187 ##### `ENABLE_FBTURBO`=false
188 188 Install 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.
189 189
190 190 ##### `ENABLE_IPTABLES`=false
191 191 Enable iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.
192 192
193 193 ##### `ENABLE_USER`=true
194 194 Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, username will be `pi`.
195 195
196 196 ##### `USER_NAME`=pi
197 197 Non-root user to create. Ignored if `ENABLE_USER`=false
198 198
199 199 ##### `ENABLE_ROOT`=false
200 200 Set root user password so root login will be enabled
201 201
202 202 ##### `ENABLE_HARDNET`=false
203 203 Enable IPv4/IPv6 network stack hardening settings.
204 204
205 205 ##### `ENABLE_SPLITFS`=false
206 206 Enable having root partition on an USB drive by creating two image files: one for the `/boot/firmware` mount point, and another for `/`.
207 207
208 208 ##### `CHROOT_SCRIPTS`=""
209 209 Path 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.
210 210
211 211 ##### `ENABLE_INITRAMFS`=false
212 212 Create 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.
213 213
214 214 ##### `ENABLE_IFNAMES`=true
215 215 Enable 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 release `stretch` is used.
216 216
217 217 ##### `DISABLE_UNDERVOLT_WARNINGS`=
218 Disable 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.
218 Disable 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.
219 219
220 220 #### SSH settings:
221 221 ##### `SSH_ENABLE_ROOT`=false
222 222 Enable 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`.
223 223
224 224 ##### `SSH_DISABLE_PASSWORD_AUTH`=false
225 225 Disable password based SSH authentication. Only public key based SSH (v2) authentication will be supported.
226 226
227 227 ##### `SSH_LIMIT_USERS`=false
228 228 Limit the users that are allowed to login via SSH. Only allow user `USER_NAME`=pi and root if `SSH_ENABLE_ROOT`=true to login.
229 229
230 230 ##### `SSH_ROOT_PUB_KEY`=""
231 231 Add 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`.
232 232
233 233 ##### `SSH_USER_PUB_KEY`=""
234 234 Add 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.
235 235
236 236 #### Kernel compilation:
237 237 ##### `BUILD_KERNEL`=false
238 238 Build 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.
239 239
240 240 ##### `KERNEL_REDUCE`=false
241 241 Reduce the size of the generated kernel by removing unwanted device, network and filesystem drivers (experimental).
242 242
243 243 ##### `KERNEL_THREADS`=1
244 244 Number 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.
245 245
246 246 ##### `KERNEL_HEADERS`=true
247 247 Install kernel headers with built kernel.
248 248
249 249 ##### `KERNEL_MENUCONFIG`=false
250 250 Start `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.
251 251
252 252 ##### `KERNEL_REMOVESRC`=true
253 253 Remove all kernel sources from the generated OS image after it was built and installed.
254 254
255 255 ##### `KERNELSRC_DIR`=""
256 256 Path to a directory of [RaspberryPi Linux kernel sources](https://github.com/raspberrypi/linux) that will be copied, configured, build and installed inside the chroot.
257 257
258 258 ##### `KERNELSRC_CLEAN`=false
259 259 Clean 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.
260 260
261 261 ##### `KERNELSRC_CONFIG`=true
262 262 Run `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.
263 263
264 264 ##### `KERNELSRC_USRCONFIG`=""
265 265 Copy own config file to kernel `.config`. If `KERNEL_MENUCONFIG`=true then running after copy.
266 266
267 267 ##### `KERNELSRC_PREBUILT`=false
268 268 With 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.
269 269
270 270 ##### `RPI_FIRMWARE_DIR`=""
271 271 The directory 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.
272 272
273 273 #### Reduce disk usage:
274 274 The following list of parameters is ignored if `ENABLE_REDUCE`=false.
275 275
276 276 ##### `REDUCE_APT`=true
277 277 Configure APT to use compressed package repository lists and no package caching files.
278 278
279 279 ##### `REDUCE_DOC`=true
280 280 Remove all doc files (harsh). Configure APT to not include doc files on future `apt-get` package installations.
281 281
282 282 ##### `REDUCE_MAN`=true
283 283 Remove all man pages and info files (harsh). Configure APT to not include man pages on future `apt-get` package installations.
284 284
285 285 ##### `REDUCE_VIM`=false
286 286 Replace `vim-tiny` package by `levee` a tiny vim clone.
287 287
288 288 ##### `REDUCE_BASH`=false
289 289 Remove `bash` package and switch to `dash` shell (experimental).
290 290
291 291 ##### `REDUCE_HWDB`=true
292 292 Remove PCI related hwdb files (experimental).
293 293
294 294 ##### `REDUCE_SSHD`=true
295 295 Replace `openssh-server` with `dropbear`.
296 296
297 297 ##### `REDUCE_LOCALE`=true
298 298 Remove all `locale` translation files.
299 299
300 300 #### Encrypted root partition:
301 301
302 302 ##### `ENABLE_CRYPTFS`=false
303 303 Enable 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.
304 304
305 305 ##### `CRYPTFS_PASSWORD`=""
306 306 Set password of the encrypted root partition. This parameter is mandatory if `ENABLE_CRYPTFS`=true.
307 307
308 308 ##### `CRYPTFS_MAPPING`="secure"
309 309 Set name of dm-crypt managed device-mapper mapping.
310 310
311 311 ##### `CRYPTFS_CIPHER`="aes-xts-plain64:sha512"
312 312 Set cipher specification string. `aes-xts*` ciphers are strongly recommended.
313 313
314 314 ##### `CRYPTFS_XTSKEYSIZE`=512
315 315 Sets key size in bits. The argument has to be a multiple of 8.
316 316
317 317 ## Understanding the script
318 318 The 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:
319 319
320 320 | Script | Description |
321 321 | --- | --- |
322 322 | `10-bootstrap.sh` | Debootstrap basic system |
323 323 | `11-apt.sh` | Setup APT repositories |
324 324 | `12-locale.sh` | Setup Locales and keyboard settings |
325 325 | `13-kernel.sh` | Build and install RPi2/3 Kernel |
326 326 | `14-rpi-config.sh` | Setup RPi2/3 config and cmdline |
327 327 | `20-networking.sh` | Setup Networking |
328 328 | `21-firewall.sh` | Setup Firewall |
329 329 | `30-security.sh` | Setup Users and Security settings |
330 330 | `31-logging.sh` | Setup Logging |
331 331 | `32-sshd.sh` | Setup SSH and public keys |
332 332 | `41-uboot.sh` | Build and Setup U-Boot |
333 333 | `42-fbturbo.sh` | Build and Setup fbturbo Xorg driver |
334 334 | `50-firstboot.sh` | First boot actions |
335 335 | `99-reduce.sh` | Reduce the disk space usage |
336 336
337 337 All 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.
338 338
339 339 | Directory | Description |
340 340 | --- | --- |
341 341 | `apt` | APT management configuration files |
342 342 | `boot` | Boot and RPi2/3 configuration files |
343 343 | `dpkg` | Package Manager configuration |
344 344 | `etc` | Configuration files and rc scripts |
345 345 | `firstboot` | Scripts that get executed on first boot |
346 346 | `initramfs` | Initramfs scripts |
347 347 | `iptables` | Firewall configuration files |
348 348 | `locales` | Locales configuration |
349 349 | `modules` | Kernel Modules configuration |
350 350 | `mount` | Fstab configuration |
351 351 | `network` | Networking configuration files |
352 352 | `sysctl.d` | Swapping and Network Hardening configuration |
353 353 | `xorg` | fbturbo Xorg driver configuration |
354 354
355 355 ## Custom packages and scripts
356 356 Debian 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`.
357 357
358 358 Scripts in the custom.d directory will be executed after all other installation is complete but before the image is created.
359 359
360 360 ## Logging of the bootstrapping process
361 361 All 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:
362 362
363 363 ```shell
364 364 script -c 'APT_SERVER=ftp.de.debian.org ./rpi23-gen-image.sh' ./build.log
365 365 ```
366 366
367 367 ## Flashing the image file
368 368 After 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`.
369 369
370 370 #####Flashing examples:
371 371 ```shell
372 372 bmaptool copy ./images/jessie/2017-01-23-rpi3-jessie.img /dev/mmcblk0
373 373 dd bs=4M if=./images/jessie/2017-01-23-rpi3-jessie.img of=/dev/mmcblk0
374 374 ```
375 375 If you have set `ENABLE_SPLITFS`, copy the `-frmw` image on the microSD card, then the `-root` one on the USB drive:
376 376 ```shell
377 377 bmaptool copy ./images/jessie/2017-01-23-rpi3-jessie-frmw.img /dev/mmcblk0
378 378 bmaptool copy ./images/jessie/2017-01-23-rpi3-jessie-root.img /dev/sdc
379 379 ```
380 380
381 381 ## External links and references
382 382 * [Debian worldwide mirror sites](https://www.debian.org/mirror/list)
383 383 * [Debian Raspberry Pi 2 Wiki](https://wiki.debian.org/RaspberryPi2)
384 384 * [Debian CrossToolchains Wiki](https://wiki.debian.org/CrossToolchains)
385 385 * [Official Raspberry Pi Firmware on github](https://github.com/raspberrypi/firmware)
386 386 * [Official Raspberry Pi Kernel on github](https://github.com/raspberrypi/linux)
387 387 * [U-BOOT git repository](http://git.denx.de/?p=u-boot.git;a=summary)
388 388 * [Xorg DDX driver fbturbo](https://github.com/ssvb/xf86-video-fbturbo)
389 389 * [RPi3 Wireless interface firmware](https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm)
390 390 * [Collabora RPi2 Kernel precompiled](https://repositories.collabora.co.uk/debian/)
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