Compiling the Linux kernel with Ubuntu

1. Download the kernel and unzip it into the/USR/SRC directory

Execute the following command at the terminal to download the kernel of version 4.16.14 (currently the latest stable version) to the current shell Open Directory

wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.16.14.tar.xz  

Unzip the downloaded kernel file linux-4.16.14.tar.xz

xz -d linux-4.16.14.tar.xz   将 linux-4.16.14.tar.xz  文件解压成 linux-4.16.14.tar 压缩文件sudo tar -xvf linux-4.16.14.tar  -C /usr/src  将 linux-4.16.14.tar 解压到 /usr/src 目录下

2. Installation of dependent libraries that may be used by the compilation kernel

    sudo apt-get install libncurses5-dev libssl-dev sudo apt-get install build-essential openssl sudo apt-get install zlibc minizip sudo apt-get install libidn11-dev libidn11sudo apt-get install bisonsudo apt-get install flex

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3. Configuring kernel Compilation Parameters

cd /usr/src/linux-4.16.14  切换到刚才我们解压的内核源代码目录下make mrproper   清除编译过程产生的中间文件，就是将内核代码还原为刚解压的状态，最好每次编译前执行一下。make clean      清除上次编译产生的中间文件，最好每次编译前执行一下。make menuconfig 配置编译参数，编译的内核模块选择，内核剪裁需要重点研究的部分。

4. Compiling the kernel

   make -jN     也可以只使用 make ，N表示编译时用几个线程编译，最大不要超过CPU个数的两倍

Compiling the kernel is time consuming, about two hours.

5. Install the kernel

   make modules_install   安装内核模块，驱动等   make install  安装内核

6. Other Notes

Kernel configuration, if you are prompted to find a dependent file during compilation, simply install the corresponding dependent file based on the error message you are prompted for.

For example, the following error message appears:

/bin/sh: 1: flex: not foundscripts/Makefile.lib:202: recipe for target 'scripts/kconfig/zconf.lex.c' failedmake[2]: *** [scripts/kconfig/zconf.lex.c] Error 127Makefile:514: recipe for target 'silentoldconfig' failed

The Flex module is required, but the computer is not installed, just perform sudo apt-get install flex the installation on the line.

Compiling the Linux kernel using Ubuntu