export LINUX_VERSION=6.18.7 IFS='.' read -r LINUX_VERSION_MAJOR LINUX_VERSION_MINOR LINUX_VERSION_PATCH <<< $LINUX_VERSION export LINUX_VERSION_MAJOR LINUX_VERSION_MINOR LINUX_VERSION_PATCH export LINUX_URL=https://cdn.kernel.org/pub/linux/kernel/v$LINUX_VERSION_MAJOR.x/linux-$LINUX_VERSION.tar.xz