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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 ## Configuration template files
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
46 #####Command-line examples:
47 ```shell
48 CONFIG_TEMPLATE=rpi3stretch ./rpi23-gen-image.sh
49 CONFIG_TEMPLATE=rpi2stretch ./rpi23-gen-image.sh
50 ```
51
52 ## Supported parameters and settings
43 53 #### APT settings:
44 54 ##### `APT_SERVER`="ftp.debian.org"
45 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.
46 56
47 57 ##### `APT_PROXY`=""
48 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.
49 59
50 60 ##### `APT_INCLUDES`=""
51 61 A comma separated list of additional packages to be installed during bootstrapping.
52 62
53 63 #### General system settings:
54 64 ##### `RPI_MODEL`=2
55 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.
56 66
57 67 ##### `RELEASE`="jessie"
58 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.
59 69
60 70 ##### `HOSTNAME`="rpi$RPI_MODEL-$RELEASE"
61 71 Set system host name. It's recommended that the host name is unique in the corresponding subnet.
62 72
63 73 ##### `PASSWORD`="raspberry"
64 74 Set system `root` password. It's **STRONGLY** recommended that you choose a custom password.
65 75
66 76 ##### `USER_PASSWORD`="raspberry"
67 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.
68 78
69 79 ##### `DEFLOCAL`="en_US.UTF-8"
70 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`.
71 81
72 82 ##### `TIMEZONE`="Europe/Berlin"
73 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.
74 84
75 85 ##### `EXPANDROOT`=true
76 86 Expand the root partition and filesystem automatically on first boot.
77 87
78 88 #### Keyboard settings:
79 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.
80 90
81 91 ##### `XKB_MODEL`=""
82 92 Set the name of the model of your keyboard type.
83 93
84 94 ##### `XKB_LAYOUT`=""
85 95 Set the supported keyboard layout(s).
86 96
87 97 ##### `XKB_VARIANT`=""
88 98 Set the supported variant(s) of the keyboard layout(s).
89 99
90 100 ##### `XKB_OPTIONS`=""
91 101 Set extra xkb configuration options.
92 102
93 103 #### Networking settings (DHCP):
94 104 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`.`
95 105
96 106 #####`ENABLE_DHCP`=true
97 107 Set the system to use DHCP. This requires an DHCP server.
98 108
99 109 #### Networking settings (static):
100 110 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`.
101 111
102 112 #####`NET_ADDRESS`=""
103 113 Set a static IPv4 or IPv6 address and its prefix, separated by "/", eg. "192.169.0.3/24".
104 114
105 115 #####`NET_GATEWAY`=""
106 116 Set the IP address for the default gateway.
107 117
108 118 #####`NET_DNS_1`=""
109 119 Set the IP address for the first DNS server.
110 120
111 121 #####`NET_DNS_2`=""
112 122 Set the IP address for the second DNS server.
113 123
114 124 #####`NET_DNS_DOMAINS`=""
115 125 Set the default DNS search domains to use for non fully qualified host names.
116 126
117 127 #####`NET_NTP_1`=""
118 128 Set the IP address for the first NTP server.
119 129
120 130 #####`NET_NTP_2`=""
121 131 Set the IP address for the second NTP server.
122 132
123 133 #### Basic system features:
124 134 ##### `ENABLE_CONSOLE`=true
125 135 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.
126 136
127 137 ##### `ENABLE_IPV6`=true
128 138 Enable IPv6 support. The network interface configuration is managed via systemd-networkd.
129 139
130 140 ##### `ENABLE_SSHD`=true
131 141 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.
132 142
133 143 ##### `ENABLE_NONFREE`=false
134 144 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.
135 145
136 146 ##### `ENABLE_WIRELESS`=false
137 147 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`.
138 148
139 149 ##### `ENABLE_RSYSLOG`=true
140 150 If set to false, disable and uninstall rsyslog (so logs will be available only
141 151 in journal files)
142 152
143 153 ##### `ENABLE_SOUND`=true
144 154 Enable sound hardware and install Advanced Linux Sound Architecture.
145 155
146 156 ##### `ENABLE_HWRANDOM`=true
147 157 Enable Hardware Random Number Generator. Strong random numbers are important for most network based communications that use encryption. It's recommended to be enabled.
148 158
149 159 ##### `ENABLE_MINGPU`=false
150 160 Minimize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.
151 161
152 162 ##### `ENABLE_DBUS`=true
153 163 Install and enable D-Bus message bus. Please note that systemd should work without D-bus but it's recommended to be enabled.
154 164
155 165 ##### `ENABLE_XORG`=false
156 166 Install Xorg open-source X Window System.
157 167
158 168 ##### `ENABLE_WM`=""
159 169 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`.
160 170
161 171 #### Advanced system features:
162 172 ##### `ENABLE_MINBASE`=false
163 173 Use debootstrap script variant `minbase` which only includes essential packages and apt. This will reduce the disk usage by about 65 MB.
164 174
165 175 ##### `ENABLE_REDUCE`=false
166 176 Reduce the disk space usage by deleting packages and files. See `REDUCE_*` parameters for detailed information.
167 177
168 178 ##### `ENABLE_UBOOT`=false
169 179 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.
170 180
171 181 ##### `ENABLE_FBTURBO`=false
172 182 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.
173 183
174 184 ##### `ENABLE_IPTABLES`=false
175 185 Enable iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.
176 186
177 187 ##### `ENABLE_USER`=true
178 188 Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, username will be `pi`.
179 189
180 190 ##### `USER_NAME`=pi
181 191 Non-root user to create. Ignored if `ENABLE_USER`=false
182 192
183 193 ##### `ENABLE_ROOT`=false
184 194 Set root user password so root login will be enabled
185 195
186 196 ##### `ENABLE_ROOT_SSH`=true
187 197 Enable password root login via SSH. May be a security risk with default
188 198 password, use only in trusted environments.
189 199
190 200 ##### `ENABLE_HARDNET`=false
191 201 Enable IPv4/IPv6 network stack hardening settings.
192 202
193 203 ##### `ENABLE_SPLITFS`=false
194 204 Enable having root partition on an USB drive by creating two image files: one for the `/boot/firmware` mount point, and another for `/`.
195 205
196 206 ##### `CHROOT_SCRIPTS`=""
197 207 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.
198 208
199 209 ##### `ENABLE_INITRAMFS`=false
200 210 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.
201 211
202 212 ##### `ENABLE_IFNAMES`=true
203 213 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.
204 214
205 215 #### Kernel compilation:
206 216 ##### `BUILD_KERNEL`=false
207 217 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.
208 218
209 219 ##### `KERNEL_REDUCE`=false
210 220 Reduce the size of the generated kernel by removing unwanted device, network and filesystem drivers (experimental).
211 221
212 222 ##### `KERNEL_THREADS`=1
213 223 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.
214 224
215 225 ##### `KERNEL_HEADERS`=true
216 226 Install kernel headers with built kernel.
217 227
218 228 ##### `KERNEL_MENUCONFIG`=false
219 229 Start `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.
220 230
221 231 ##### `KERNEL_REMOVESRC`=true
222 232 Remove all kernel sources from the generated OS image after it was built and installed.
223 233
224 234 ##### `KERNELSRC_DIR`=""
225 235 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.
226 236
227 237 ##### `KERNELSRC_CLEAN`=false
228 238 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.
229 239
230 240 ##### `KERNELSRC_CONFIG`=true
231 241 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.
232 242
233 243 ##### `KERNELSRC_USRCONFIG`=""
234 244 Copy own config file to kernel `.config`. If `KERNEL_MENUCONFIG`=true then running after copy.
235 245
236 246 ##### `KERNELSRC_PREBUILT`=false
237 247 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.
238 248
239 249 ##### `RPI_FIRMWARE_DIR`=""
240 250 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.
241 251
242 252 #### Reduce disk usage:
243 253 The following list of parameters is ignored if `ENABLE_REDUCE`=false.
244 254
245 255 ##### `REDUCE_APT`=true
246 256 Configure APT to use compressed package repository lists and no package caching files.
247 257
248 258 ##### `REDUCE_DOC`=true
249 259 Remove all doc files (harsh). Configure APT to not include doc files on future `apt-get` package installations.
250 260
251 261 ##### `REDUCE_MAN`=true
252 262 Remove all man pages and info files (harsh). Configure APT to not include man pages on future `apt-get` package installations.
253 263
254 264 ##### `REDUCE_VIM`=false
255 265 Replace `vim-tiny` package by `levee` a tiny vim clone.
256 266
257 267 ##### `REDUCE_BASH`=false
258 268 Remove `bash` package and switch to `dash` shell (experimental).
259 269
260 270 ##### `REDUCE_HWDB`=true
261 271 Remove PCI related hwdb files (experimental).
262 272
263 273 ##### `REDUCE_SSHD`=true
264 274 Replace `openssh-server` with `dropbear`.
265 275
266 276 ##### `REDUCE_LOCALE`=true
267 277 Remove all `locale` translation files.
268 278
269 279 #### Encrypted root partition:
270 280
271 281 ##### `ENABLE_CRYPTFS`=false
272 282 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.
273 283
274 284 ##### `CRYPTFS_PASSWORD`=""
275 285 Set password of the encrypted root partition. This parameter is mandatory if `ENABLE_CRYPTFS`=true.
276 286
277 287 ##### `CRYPTFS_MAPPING`="secure"
278 288 Set name of dm-crypt managed device-mapper mapping.
279 289
280 290 ##### `CRYPTFS_CIPHER`="aes-xts-plain64:sha512"
281 291 Set cipher specification string. `aes-xts*` ciphers are strongly recommended.
282 292
283 293 ##### `CRYPTFS_XTSKEYSIZE`=512
284 294 Sets key size in bits. The argument has to be a multiple of 8.
285 295
286 296 ## Understanding the script
287 297 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:
288 298
289 299 | Script | Description |
290 300 | --- | --- |
291 301 | `10-bootstrap.sh` | Debootstrap basic system |
292 302 | `11-apt.sh` | Setup APT repositories |
293 303 | `12-locale.sh` | Setup Locales and keyboard settings |
294 304 | `13-kernel.sh` | Build and install RPi2/3 Kernel |
295 305 | `20-networking.sh` | Setup Networking |
296 306 | `21-firewall.sh` | Setup Firewall |
297 307 | `30-security.sh` | Setup Users and Security settings |
298 308 | `31-logging.sh` | Setup Logging |
299 309 | `41-uboot.sh` | Build and Setup U-Boot |
300 310 | `42-fbturbo.sh` | Build and Setup fbturbo Xorg driver |
301 311 | `50-firstboot.sh` | First boot actions |
302 312 | `99-reduce.sh` | Reduce the disk space usage |
303 313
304 314 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.
305 315
306 316 | Directory | Description |
307 317 | --- | --- |
308 318 | `apt` | APT management configuration files |
309 319 | `boot` | Boot and RPi2/3 configuration files |
310 320 | `dpkg` | Package Manager configuration |
311 321 | `etc` | Configuration files and rc scripts |
312 322 | `firstboot` | Scripts that get executed on first boot |
313 323 | `initramfs` | Initramfs scripts |
314 324 | `iptables` | Firewall configuration files |
315 325 | `locales` | Locales configuration |
316 326 | `modules` | Kernel Modules configuration |
317 327 | `mount` | Fstab configuration |
318 328 | `network` | Networking configuration files |
319 329 | `sysctl.d` | Swapping and Network Hardening configuration |
320 330 | `xorg` | fbturbo Xorg driver configuration |
321 331
322 332 ## Custom packages and scripts
323 333 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`.
324 334
325 335 Scripts in the custom.d directory will be executed after all other installation is complete but before the image is created.
326 336
327 337 ## Logging of the bootstrapping process
328 338 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:
329 339
330 340 ```shell
331 341 script -c 'APT_SERVER=ftp.de.debian.org ./rpi23-gen-image.sh' ./build.log
332 342 ```
333 343
334 344 ## Flashing the image file
335 345 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`.
336 346
337 347 #####Flashing examples:
338 348 ```shell
339 349 bmaptool copy ./images/jessie/2015-12-13-debian-jessie.img /dev/mmcblk0
340 350 dd bs=4M if=./images/jessie/2015-12-13-debian-jessie.img of=/dev/mmcblk0
341 351 ```
342 352 If you have set `ENABLE_SPLITFS`, copy the `-frmw` image on the microSD card, then the `-root` one on the USB drive:
343 353 ```shell
344 354 bmaptool copy ./images/jessie/2015-12-13-debian-jessie-frmw.img /dev/mmcblk0
345 355 bmaptool copy ./images/jessie/2015-12-13-debian-jessie-root.img /dev/sdc
346 356 ```
347 357
348 358 ## External links and references
349 359 * [Debian worldwide mirror sites](https://www.debian.org/mirror/list)
350 360 * [Debian Raspberry Pi 2 Wiki](https://wiki.debian.org/RaspberryPi2)
351 361 * [Debian CrossToolchains Wiki](https://wiki.debian.org/CrossToolchains)
352 362 * [Official Raspberry Pi Firmware on github](https://github.com/raspberrypi/firmware)
353 363 * [Official Raspberry Pi Kernel on github](https://github.com/raspberrypi/linux)
354 364 * [U-BOOT git repository](http://git.denx.de/?p=u-boot.git;a=summary)
355 365 * [Xorg DDX driver fbturbo](https://github.com/ssvb/xf86-video-fbturbo)
356 366 * [RPi3 Wireless interface firmware](https://github.com/RPi-Distro/firmware-nonfree/tree/master/brcm80211/brcm)
357 367 * [Collabora RPi2 Kernel precompiled](https://repositories.collabora.co.uk/debian/)
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