Build Custom Ubuntu Kernel¶

1. Create container directory:
   

   $ mkdir custom_kernel && cd custom_kernel
   

2. Grab kernel source for the currently installed kernel version (NOTE: this can be modified as needed):
   

   $ apt-get source linux-image-$(uname -r)
   

3. Install build dependencies:
   

   $ sudo apt-get build-dep linux-image-$(uname -r)
   

4. Modify configuration (NOTE: you need to go through each (Y, Exit, Y, Exit..) or get a complaint about config later...):
   

   $ chmod a+x debian/rules
   $ chmod a+x debian/scripts/*
   $ chmod a+x debian/scripts/misc/*
   $ fakeroot debian/rules clean
   $ fakeroot debian/rules editconfigs 
   

5. Build kernel:
   

   $ fakeroot debian/rules clean
   $ fakeroot debian/rules binary-headers binary-generic binary-perarch
   

6. Install kernel `.debs`:
   

   $ sudo dpkg -i linux-headers-3.19.0-80_3.19.0-80.88~14.04.1_all.deb linux-headers-3.19.0-80-generic_3.19.0-80.88~14.04.1_amd64.deb linux-image-3.19.0-80-generic_3.19.0-80.88~14.04.1_amd64.deb linux-image-extra-3.19.0-80-generic_3.19.0-80.88~14.04.1_amd64.deb
   

Useful Commands¶

• If using printk debug, increase the kernel logging verbosity:
  

  # echo 8 > /proc/sys/kernel/printk