A few months ago I started compiling Linux on my own. Not for any particular reason, just to do it myself. By nature, the commands to compile the kernel are repetitive which means it’s the perfect thing to write a script to do!
Just give it the kernel source directory and let it do it’s thing. Once done, it creates two deb packages, the compiled kernel and the kernel headers (this also makes it only work on Debian-based distros). From there, it’s trivial to install a deb package.
The script is based off the instructions from on the Ubuntu wiki found here.
Note that this script will most likely continue to evolve and the copy below may become outdated. Thus, the most copy can always be found on its GitHub repo.
Without further ado…
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#! /bin/bash
# Modified from https://wiki.ubuntu.com/KernelTeam/GitKernelBuild
function printLine {
for ((i=0; i<$1; i++)); do
echo -en "=-"
done
echo "="
}
clear
printLine 27
echo -e "\t\tLinux Compile Script"
printLine 27
echo -e "\nThis script will compile the Linux kernel source into a .deb package for use on Debian based systems.\nEnsure the full kernel source is in the directory specified below.\nCtrl + C to canel at any time."
# If given a kernel source directory, cd to it. If not, assume the source is in the working directory.
if [ $1 ]; then
directory=$1
else
echo -e "\nNo directory specified. Assuming already in kernel source directory."
directory=$(pwd)
fi
# Print confirmation of directory
echo -en "\nUsing directory \"$directory\". Enter to begin. "
read junk
# cd to given directory
cd $directory
# At least make sure a MakeFile is present before attemping to compile
if [ ! -f "Makefile" ]; then
echo -e "\nFATAL ERROR: Makefile not found. Exiting."
cd -
exit
fi
echo -en "\nCopying current kernel config..."
#cp /boot/config-$(uname -r) .config
echo -e "done."
echo -en "\nUpdating config file to defaults..."
yes '' | make oldconfig > /dev/null
echo -e "done."
echo -en "\nRemoving \"echo \"+\"\" from scripts/setlocalversion..."
sed -rie 's/echo "\+"/#echo "\+"/' scripts/setlocalversion
echo -e "done."
echo -en "\nCleaning kernel source directory..."
make-kpkg clean > /dev/null
echo -e "done.\n"
printLine 27
echo -en "Ready to compile kernel. Make any custom config changes before going on. Enter to continue. "
read ready
# Get the current time so we can time the compile
START=$(date +%s)
# Compile it!
CONCURRENCY_LEVEL=`getconf _NPROCESSORS_ONLN` fakeroot make-kpkg --initrd --append-to-version=-custom kernel_image kernel_headers
# Get finished time and calculate how many minutes the compile took
TIME=$(echo "scale=3; ($(date +%s) - $START) / 60" | bc)
# Go back to the previous directory
cd -
echo -e "\n\n\n\n"
printLine 27
echo -e "Kernel compile finished. Use dpkg to install the\nkernel packages at will."
echo "Time to compile: " $TIME " minutes. Bye!"
exit