1. Building a custom kernel ​

• Download the latest pre-compiled Eupnea ChromeOS kernel here
• Download the latest pre-compiled Eupnea mainline kernel here

Building the Eupnea ChromeOS kernel ​

1. Install dependencies:
   • make
   • automake
   • gcc
   • gcc c++
   • kernel development libraries
   • ncurses development library
   • xz utils
   • OpenSSL development libraries
   • GNU bc
   • flex
   • libelf1 development libraries
   • bison
   • binutils
   • dracut

On debian based systems the dependencies can be installed with:

sudo apt-get update && sudo apt-get install build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison binutils dracut

2. Clone the kernel repo:

git clone https://github.com/enter-dragon/chromeos-kernel.git && cd chromeos-kernel

3. Optional: Modify the kernel config in kernel.conf.

4. Optional: Modify the kernel branch in line 12 in kernel_build.py.

5. Start the build script: python3 ./kernel_build.py.

6. The compiled/compressed files can be found in the root of the cloned repo:

   • bzImage
   • modules.tar.xz
   • headers.tar.xz

7. Proceed to installing the kernel.

Building the Eupnea mainline kernel ​

1. Install dependencies:
   • make
   • automake
   • gcc
   • gcc c++
   • kernel development libraries
   • ncurses development library
   • xz utils
   • OpenSSL development libraries
   • GNU bc
   • flex
   • libelf1 development libraries
   • bison
   • binutils

On debian based systems the dependencies can be installed with:

sudo apt-get update && sudo apt-get install build-essential ncurses-dev xz-utils libssl-dev bc flex libelf-dev bison binutils

2. Clone the kernel repo:

git clone https://github.com/enter-dragon/mainline-kernel.git && cd mainline-kernel

3. Optional: Modify the kernel config in kernel.conf
4. Optional: Modify the kernel version in line 6 in build.sh
5. Start the build script: bash ./build.sh
6. The compiled/compressed files can be found in the root of the cloned repo:
   • bzImage
   • modules.tar.xz
   • headers.tar.xz

2. Installing the kernel ​

1. Sign the kernel and add a cmdline to it.

   This process can be done automatically with the install-kernelscript
   Run /usr/lib/eupnea/install-kernel --help to see all available script options.

2. Extract the modules into /usr/lib/modules/<insert_version> and the headers into /usr/src/linux-headers-<insert_version>. Replace insert_version with your kernel version

   The kernel version can can be read from the bzImage file with file -bL bzImage | grep -o 'version [^ ]*' | cut -d ' ' -f 2.

3. Eupnea-systems only: Uninstall all other eupnea-kernel packages with your distros package manager and this wildcard: eupnea-*-kernel.
   Warning: The kernel packages might be reinstalled by an update, which would also overwrite your custom kernel.