Raspi2-3_GenImage Commit - r468:9c894e71047f · Collaboration Tremplin des Sciences

49

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. If `apt-cacher-ng` is running on default `http://127.0.0.1:3142` it is autodetected and you don't need to set this.

49

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. If `apt-cacher-ng` is running on default `http://127.0.0.1:3142` it is autodetected and you don't need to set this.

50

51

##### `APT_INCLUDES`=""

51

##### `APT_INCLUDES`=""

52

A comma separated list of additional packages to be installed by debootstrap during bootstrapping.

52

A comma-separated list of additional packages to be installed by debootstrap during bootstrapping.

53

54

##### `APT_INCLUDES_LATE`=""

54

##### `APT_INCLUDES_LATE`=""

55

A comma 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.

55

A comma-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.

56

57

---

57

---

58

59

#### General system settings:

59

#### General system settings:

60

##### `SET_ARCH`=32

60

##### `SET_ARCH`=32

61

Set Architecture to default 32bit. If you want to to compile 64bit (RPI3 or RPI3+) set it to `64`. This option will set every needed crosscompiler or boeard specific option for a successful build.

61

Set Architecture to default 32bit. If you want to compile 64-bit (RPI3 or RPI3+) set it to `64`. This option will set every needed cross-compiler or board specific option for a successful build.

62

63

##### `RPI_MODEL`=2

63

##### `RPI_MODEL`=2

64

Specifiy the target Raspberry Pi hardware model. The script at this time supports the following Raspberry Pi models:

64

Specify the target Raspberry Pi hardware model. The script at this time supports the following Raspberry Pi models:

65

- `0` = ~~Used for~~ Raspberry Pi 0 and Raspberry Pi 0 W

65

- `0` = Raspberry Pi 0 and Raspberry Pi 0 W

66

- `1` = ~~Used for~~ Pi 1 model A and B

66

- `1` = Raspberry Pi 1 model A and B

67

- `1P` = ~~Used for~~ Pi 1 model B+ and A+

67

- `1P` = Raspberry Pi 1 model B+ and A+

68

- `2` = ~~Used for~~ Pi 2 model B

68

- `2` = Raspberry Pi 2 model B

69

- `3` = ~~Used for~~ Pi 3 model B

69

- `3` = Raspberry Pi 3 model B

70

- `3P` = ~~Used for~~ Pi 3 model B+

70

- `3P` = Raspberry Pi 3 model B+

71

- `BUILD_KERNEL`=true will automatically be set if the Raspberry Pi model `3` or `3P` is used.

72

71

73

##### `RELEASE`="buster"

72

##### `RELEASE`="buster"

74

Set the desired Debian release name. The script at this time supports the bootstrapping of the Debian releases `stretch` and `buster`.

73

Set the desired Debian release name. The script at this time supports the bootstrapping of the Debian releases `stretch` and `buster`.

117

---

116

---

118

117

119

#### Networking settings (DHCP):

118

#### Networking settings (DHCP):

120

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`.`

119

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`.`

121

120

122

##### `ENABLE_DHCP`=true

121

##### `ENABLE_DHCP`=true

123

Set the system to use DHCP. This requires an DHCP server.

122

Set the system to use DHCP. This requires an DHCP server.

158

Enables printing kernel messages to konsole. printk is `3 4 1 3` as in raspbian.

157

Enables printing kernel messages to konsole. printk is `3 4 1 3` as in raspbian.

159

158

160

##### `ENABLE_BLUETOOTH`=false

159

##### `ENABLE_BLUETOOTH`=false

161

Enable onboard Bluetooth interface on the RPi0/3/3P. See: https://spellfoundry.com/2016/05/29/configuring-gpio-serial-port-raspbian-jessie-including-pi-3/

160

Enable onboard Bluetooth interface on the RPi0/3/3P. See: [Configuring the GPIO serial port on Raspbian jessie and stretch](https://spellfoundry.com/2016/05/29/configuring-gpio-serial-port-raspbian-jessie-including-pi-3/).

162

161

163

##### `ENABLE_MINIUART_OVERLAY`=false

162

##### `ENABLE_MINIUART_OVERLAY`=false

164

Enable Bluetooth to use this. Adds overlay to swap UART0 with UART1. Enabling (slower) Bluetooth and full speed serial console. - RPI `0` `3` `3P` have a fast `hardware UART0` (ttyAMA0) and a `mini UART1` (ttyS0)! RPI `1` `1P` `2` only have a `hardware UART0`. `UART0` is considered better, because is faster and more stable than `mini UART1`. By default the Bluetooth modem is mapped to the `hardware UART0` and `mini UART` is used for console. The `mini UART` is a problem for the serial console, because its baudrate depends on the ~~cpu~~ frequency, which is changing on runtime. Resulting in a volatile baudrate and thus in an unusable serial console.

163

Enable Bluetooth to use this. Adds overlay to swap UART0 with UART1. Enabling (slower) Bluetooth and full speed serial console. - RPI `0` `3` `3P` have a fast `hardware UART0` (ttyAMA0) and a `mini UART1` (ttyS0)! RPI `1` `1P` `2` only have a `hardware UART0`. `UART0` is considered better, because is faster and more stable than `mini UART1`. By default the Bluetooth modem is mapped to the `hardware UART0` and `mini UART` is used for console. The `mini UART` is a problem for the serial console, because its baudrate depends on the CPU frequency, which is changing on runtime. Resulting in a volatile baudrate and thus in an unusable serial console.

165

164

166

##### `ENABLE_TURBO`=false

165

##### `ENABLE_TURBO`=false

167

Enable Turbo mode. This setting locks cpu at highest frequency. As setting ENABLE_CONSOLE=true locks RPI to lowest CPU speed, this is can be used additionally to lock cpu hat max speed. Need a good power supply and probably cooling for the Raspberry PI.

166

Enable Turbo mode. This setting locks cpu at the highest frequency. As setting ENABLE_CONSOLE=true locks RPI to lowest CPU speed, this is can be used additionally to lock cpu hat max speed. Need a good power supply and probably cooling for the Raspberry PI.

168

167

169

##### `ENABLE_I2C`=false

168

##### `ENABLE_I2C`=false

170

Enable I2C interface on the RPi 0/1/2/3. Please check the [RPi 0/1/2/3 pinout diagrams](https://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.

169

Enable I2C interface on the RPi 0/1/2/3. Please check the [RPi 0/1/2/3 pinout diagrams](https://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.

191

Enable sound hardware and install Advanced Linux Sound Architecture.

190

Enable sound hardware and install Advanced Linux Sound Architecture.

192

191

193

##### `ENABLE_HWRANDOM`=true

192

##### `ENABLE_HWRANDOM`=true

194

Enable Hardware Random Number Generator. Strong random numbers are important for most network based communications that use encryption. It's recommended to be enabled.

193

Enable Hardware Random Number Generator. Strong random numbers are important for most network-based communications that use encryption. It's recommended to be enabled.

195

194

196

##### `ENABLE_MINGPU`=false

195

##### `ENABLE_MINGPU`=false

197

Minimize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.

196

Minimize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.

203

Install Xorg open-source X Window System.

202

Install Xorg open-source X Window System.

204

203

205

##### `ENABLE_WM`=""

204

##### `ENABLE_WM`=""

206

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`.

205

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`.

207

206

208

##### `ENABLE_SYSVINIT`=false

207

##### `ENABLE_SYSVINIT`=false

209

Support for halt,init,poweroff,reboot,runlevel,shutdown,telinit commands

208

Support for halt,init,poweroff,reboot,runlevel,shutdown,telinit commands

230

Path 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.

229

Path 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.

231

230

232

##### `ENABLE_VIDEOCORE`=false

231

##### `ENABLE_VIDEOCORE`=false

233

Install and enable the [~~Source code for~~ ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) `vcgencmd`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.

232

Install and enable the [ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) `vcgencmd`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.

234

233

235

##### `VIDEOCORESRC_DIR`=""

234

##### `VIDEOCORESRC_DIR`=""

236

Path to a directory (`userland`) of [~~Source code for~~ ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) that will be copied, configured, build and installed inside the chroot.

235

Path to a directory (`userland`) of [ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) that will be copied, configured, build and installed inside the chroot.

237

236

238

##### `ENABLE_IPTABLES`=false

237

##### `ENABLE_IPTABLES`=false

239

Enable iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.

238

Enable iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.

240

239

241

##### `ENABLE_USER`=true

240

##### `ENABLE_USER`=true

242

Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, username will be `pi`.

241

Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, the username will be `pi`.

243

242

244

##### `USER_NAME`=pi

243

##### `USER_NAME`=pi

245

Non-root user to create. Ignored if `ENABLE_USER`=false

244

Non-root user to create. Ignored if `ENABLE_USER`=false

269

268

270

#### SSH settings:

269

#### SSH settings:

271

##### `SSH_ENABLE_ROOT`=false

270

##### `SSH_ENABLE_ROOT`=false

272

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`.

271

Enable password-based root login via SSH. This may be a security risk with the default password set, use only in trusted environments. `ENABLE_ROOT` must be set to `true`.

273

272

274

##### `SSH_DISABLE_PASSWORD_AUTH`=false

273

##### `SSH_DISABLE_PASSWORD_AUTH`=false

275

Disable password based SSH authentication. Only public key based SSH (v2) authentication will be supported.

274

Disable password-based SSH authentication. Only public key based SSH (v2) authentication will be supported.

276

275

277

##### `SSH_LIMIT_USERS`=false

276

##### `SSH_LIMIT_USERS`=false

278

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. This parameter will be ignored if `dropbear` SSH is used (`REDUCE_SSHD`=true).

277

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. This parameter will be ignored if `dropbear` SSH is used (`REDUCE_SSHD`=true).

290

Build and install the latest RPi 0/1/2/3 Linux kernel. Currently only the default RPi 0/1/2/3 kernel configuration is used.

289

Build and install the latest RPi 0/1/2/3 Linux kernel. Currently only the default RPi 0/1/2/3 kernel configuration is used.

291

290

292

##### `CROSS_COMPILE`="arm-linux-gnueabihf-"

291

##### `CROSS_COMPILE`="arm-linux-gnueabihf-"

293

This sets the cross ~~compile~~ enviornment for the compiler.

292

This sets the cross-compile environment for the compiler.

294

293

295

##### `KERNEL_ARCH`="arm"

294

##### `KERNEL_ARCH`="arm"

296

This sets the kernel architecture for the compiler.

295

This sets the kernel architecture for the compiler.

308

Sets the default config for kernel compiling. If not set, `KERNEL_DEFCONFIG` will be set to "bcmrpi3\_defconfig" automatically if building for arm64.

307

Sets the default config for kernel compiling. If not set, `KERNEL_DEFCONFIG` will be set to "bcmrpi3\_defconfig" automatically if building for arm64.

309

308

310

##### `KERNEL_REDUCE`=false

309

##### `KERNEL_REDUCE`=false

311

Reduce the size of the generated kernel by removing unwanted device, network and filesystem drivers (experimental).

310

Reduce the size of the generated kernel by removing unwanted devices, network and filesystem drivers (experimental).

312

311

313

##### `KERNEL_THREADS`=1

312

##### `KERNEL_THREADS`=1

314

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.

313

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.

315

314

316

##### `KERNEL_HEADERS`=true

315

##### `KERNEL_HEADERS`=true

317

Install kernel headers with built kernel.

316

Install kernel headers with the built kernel.

318

317

319

##### `KERNEL_MENUCONFIG`=false

318

##### `KERNEL_MENUCONFIG`=false

320

Start `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.

319

Start `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Dépôts
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

             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. If `apt-cacher-ng` is running on default `http://127.0.0.1:3142` it is autodetected and you don't need to set this.
             ##### `APT_INCLUDES`=""
-            A comma separated list of additional packages to be installed by debootstrap during bootstrapping.
+            A comma-separated list of additional packages to be installed by debootstrap during bootstrapping.
             ##### `APT_INCLUDES_LATE`=""
-            A comma 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.
+            A comma-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:
             ##### `SET_ARCH`=32
-            Set Architecture to default 32bit. If you want to to compile 64bit (RPI3 or RPI3+) set it to `64`. This option will set every needed crosscompiler or boeard specific option for a successful build.
+            Set Architecture to default 32bit. If you want to compile 64-bit (RPI3 or RPI3+) set it to `64`. This option will set every needed cross-compiler or board specific option for a successful build.
             ##### `RPI_MODEL`=2
-            Specifiy the target Raspberry Pi hardware model. The script at this time supports the following Raspberry Pi models:
+            Specify the target Raspberry Pi hardware model. The script at this time supports the following Raspberry Pi models:
-            - `0`  = Used for Raspberry Pi 0 and Raspberry Pi 0 W
+            - `0`  = Raspberry Pi 0 and Raspberry Pi 0 W
-            - `1`  = Used for Pi 1 model A and B
+            - `1`  = Raspberry Pi 1 model A and B
-            - `1P` = Used for Pi 1 model B+ and A+
+            - `1P` = Raspberry Pi 1 model B+ and A+
-            - `2`  = Used for Pi 2 model B
+            - `2`  = Raspberry Pi 2 model B
-            - `3`  = Used for Pi 3 model B
+            - `3`  = Raspberry Pi 3 model B
-            - `3P` = Used for Pi 3 model B+
+            - `3P` = Raspberry Pi 3 model B+
-            - `BUILD_KERNEL`=true will automatically be set if the Raspberry Pi model `3` or `3P` is used.
             ##### `RELEASE`="buster"
             Set the desired Debian release name. The script at this time supports the bootstrapping of the Debian releases `stretch` and `buster`.
             ---
             #### Networking settings (DHCP):
-            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`.`
+            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`.`
             ##### `ENABLE_DHCP`=true
             Set the system to use DHCP. This requires an DHCP server.
             Enables printing kernel messages to konsole. printk is `3 4 1 3` as in raspbian.
             ##### `ENABLE_BLUETOOTH`=false
-            Enable onboard Bluetooth interface on the RPi0/3/3P. See: https://spellfoundry.com/2016/05/29/configuring-gpio-serial-port-raspbian-jessie-including-pi-3/
+            Enable onboard Bluetooth interface on the RPi0/3/3P. See: [Configuring the GPIO serial port on Raspbian jessie and stretch](https://spellfoundry.com/2016/05/29/configuring-gpio-serial-port-raspbian-jessie-including-pi-3/).
             ##### `ENABLE_MINIUART_OVERLAY`=false
-            Enable Bluetooth to use this. Adds overlay to swap UART0 with UART1. Enabling (slower) Bluetooth and full speed serial console. - RPI `0` `3` `3P` have a fast `hardware UART0` (ttyAMA0) and a `mini UART1` (ttyS0)! RPI `1` `1P` `2` only have a `hardware UART0`. `UART0` is considered better, because is faster and more stable than `mini UART1`. By default the Bluetooth modem is mapped to the `hardware UART0` and `mini UART` is used for console. The `mini UART` is a problem for the serial console, because its baudrate depends on the cpu frequency, which is changing on runtime. Resulting in a volatile baudrate and thus in an unusable serial console.
+            Enable Bluetooth to use this. Adds overlay to swap UART0 with UART1. Enabling (slower) Bluetooth and full speed serial console. - RPI `0` `3` `3P` have a fast `hardware UART0` (ttyAMA0) and a `mini UART1` (ttyS0)! RPI `1` `1P` `2` only have a `hardware UART0`. `UART0` is considered better, because is faster and more stable than `mini UART1`. By default the Bluetooth modem is mapped to the `hardware UART0` and `mini UART` is used for console. The `mini UART` is a problem for the serial console, because its baudrate depends on the CPU frequency, which is changing on runtime. Resulting in a volatile baudrate and thus in an unusable serial console.
             ##### `ENABLE_TURBO`=false
-            Enable Turbo mode. This setting locks cpu at highest frequency. As setting ENABLE_CONSOLE=true locks RPI to lowest CPU speed, this is can be used additionally to lock cpu hat max speed. Need a good power supply and probably cooling for the Raspberry PI.
+            Enable Turbo mode. This setting locks cpu at the highest frequency. As setting ENABLE_CONSOLE=true locks RPI to lowest CPU speed, this is can be used additionally to lock cpu hat max speed. Need a good power supply and probably cooling for the Raspberry PI.
             ##### `ENABLE_I2C`=false
             Enable I2C interface on the RPi 0/1/2/3. Please check the [RPi 0/1/2/3 pinout diagrams](https://elinux.org/RPi_Low-level_peripherals) to connect the right GPIO pins.
             Enable sound hardware and install Advanced Linux Sound Architecture.
             ##### `ENABLE_HWRANDOM`=true
-            Enable Hardware Random Number Generator. Strong random numbers are important for most network based communications that use encryption. It's recommended to be enabled.
+            Enable 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
             Minimize the amount of shared memory reserved for the GPU. It doesn't seem to be possible to fully disable the GPU.
             Install Xorg open-source X Window System.
             ##### `ENABLE_WM`=""
-            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`.
+            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`.
             ##### `ENABLE_SYSVINIT`=false
             Support for halt,init,poweroff,reboot,runlevel,shutdown,telinit commands
             Path 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_VIDEOCORE`=false
-            Install and enable the [Source code for ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) `vcgencmd`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.
+            Install and enable the [ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) `vcgencmd`. Please note that this driver is currently limited to hardware accelerated window moving and scrolling.
             ##### `VIDEOCORESRC_DIR`=""
-            Path to a directory (`userland`) of [Source code for ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) that will be copied, configured, build and installed inside the chroot.
+            Path to a directory (`userland`) of [ARM side libraries for interfacing to Raspberry Pi GPU](https://github.com/raspberrypi/userland) that will be copied, configured, build and installed inside the chroot.
             ##### `ENABLE_IPTABLES`=false
             Enable iptables IPv4/IPv6 firewall. Simplified ruleset: Allow all outgoing connections. Block all incoming connections except to OpenSSH service.
             ##### `ENABLE_USER`=true
-            Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, username will be `pi`.
+            Create non-root user with password `USER_PASSWORD`=raspberry. Unless overridden with `USER_NAME`=user, the username will be `pi`.
             ##### `USER_NAME`=pi
             Non-root user to create.  Ignored if `ENABLE_USER`=false
             #### SSH settings:
             ##### `SSH_ENABLE_ROOT`=false
-            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`.
+            Enable password-based root login via SSH. This may be a security risk with the default password set, use only in trusted environments. `ENABLE_ROOT` must be set to `true`.
             ##### `SSH_DISABLE_PASSWORD_AUTH`=false
-            Disable password based SSH authentication. Only public key based SSH (v2) authentication will be supported.
+            Disable password-based SSH authentication. Only public key based SSH (v2) authentication will be supported.
             ##### `SSH_LIMIT_USERS`=false
             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. This parameter will be ignored if `dropbear` SSH is used (`REDUCE_SSHD`=true).
             Build and install the latest RPi 0/1/2/3 Linux kernel. Currently only the default RPi 0/1/2/3 kernel configuration is used.
             ##### `CROSS_COMPILE`="arm-linux-gnueabihf-"
-            This sets the cross compile enviornment for the compiler.
+            This sets the cross-compile environment for the compiler.
             ##### `KERNEL_ARCH`="arm"
             This sets the kernel architecture for the compiler.
             Sets 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
-            Reduce the size of the generated kernel by removing unwanted device, network and filesystem drivers (experimental).
+            Reduce the size of the generated kernel by removing unwanted devices, network and filesystem drivers (experimental).
             ##### `KERNEL_THREADS`=1
             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.
             ##### `KERNEL_HEADERS`=true
-            Install kernel headers with built kernel.
+            Install kernel headers with the built kernel.
             ##### `KERNEL_MENUCONFIG`=false
             Start `make menuconfig` interactive menu-driven kernel configuration. The script will continue after `make menuconfig` was terminated.