Compile ubuntu kernel

After reading the book "Run Linux Kernel", I feel that the examples behind the memory management part are good.

I just want to try and experience the example (I have always felt like this)

nasri@ubuntu:/usr/local$ apt-cache search linux-source
linux-source - Linux kernel source with Ubuntu patches
linux-source-3.13.0 - Linux kernel source for version 3.13.0 with Ubuntu patches
nasri@ubuntu:/usr/local$ apt-get install linux-source-3.13.0 
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
nasri@ubuntu:/usr/local$ sudo apt-get install linux-source-3.13.0 
[sudo] password for nasri: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Suggested packages:
  kernel-package libqt3-dev
The following NEW packages will be installed:
  linux-source-3.13.0
0 upgraded, 1 newly installed, 0 to remove and 51 not upgraded.
Need to get 97.5 MB of archives.
After this operation, 113 MB of additional disk space will be used.
.....

apt-cache search linux-source//获取当前内核源码版本
sudo apt-get install linux-source-3.13.0//获取内核源码

In fact, there is the kernel source code under /user/src

I am here on ubuntu system

There are 2 source codes under /user/src

nasri@ubuntu:/$ ls /usr/src/
linux-headers-4.4.0-142          linux-source-3.13.0
linux-headers-4.4.0-142-generic  linux-source-3.13.0.tar.bz2
nasri@ubuntu:/$

linux-headers-4.4.0-142和linux-headers-4.4.0-142-generic

Which one are you currently using? Use the uname -a command to see if the generic one is used

nasri@ubuntu:/usr/src/linux-headers-4.4.0-142$ uname -a
Linux ubuntu 4.4.0-142-generic #168~14.04.1-Ubuntu SMP Sat Jan 19 11:26:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
nasri@ubuntu:/usr/src/linux-headers-4.4.0-142$

But we found that the one we were downloading was linux-source-3.13.0. What does this have to do with linux-headers?

I do not know. . . I now ask in the forum

I copy the compressed package under /user/src to my local work directory

cp /usr/src/linux-source-3.13.0_nasri/linux-source-3.13.0.tar.bz2 .

Unzip:

tar -xjvf linux-source-3.13.0.tar.bz2

Switch to this directory:

nasri@ubuntu:~/Work/linux-source-3.13.0$

Wait to compile the kernel and install the necessary software:

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 libidn11

This is the software I needed to compile the 4.16 kernel that I found online. I tried it here, but I couldn’t find minizip, so I won’t install it temporarily.

Wait until the compilation is time to solve the problem

Execute the following three commands in sequence:

sudo make mrproper 

sudo make clean 

sudo make menuconfig

Among them, mrproper is to clear all intermediate files generated during the compilation process, and clean is to clear the last compiled intermediate files. After the selected graphical interface appears in menuconfig, directly press the right arrow key to select exit to exit, and select save in the exit prompt , To achieve the default configuration of the kernel .

Excuting an order:

sudo make –j8

The kernel compilation begins, wait slowly.

sudo make zImage

This should be useless

make modules

make modules_install

make install

Also modify the startup file

nasri@ubuntu:~$ sudo vim /etc/default/grub 
[sudo] password for nasri: 
nasri@ubuntu:~$ 
nasri@ubuntu:~$ 
nasri@ubuntu:~$ sudo update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.4.0-142-generic
Found initrd image: /boot/initrd.img-4.4.0-142-generic
Found linux image: /boot/vmlinuz-3.13.11-ckt39
Found initrd image: /boot/initrd.img-3.13.11-ckt39
Found linux image: /boot/vmlinuz-3.13.11-ckt39.old
Found initrd image: /boot/initrd.img-3.13.11-ckt39
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done
nasri@ubuntu:~$ sudo reboot

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=1
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX="find_preseed=/preseed.cfg auto noprompt priority=critical locale=en_US"

Remove the second line here. After restarting, select the second one and then you can select the kernel version you need to use

Here 1 is the first level menu, 3 is the second level menu, "1(space)> (space) 3"

GRUB_DEFAULT="1 > 3"
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX="find_preseed=/preseed.cfg auto noprompt priority=critical locale=en_US"

Here is an introduction to explain this 1> 2 secondary menu https://www.cnblogs.com/open-skill/p/8295234.html

Restart and try

Successfully replaced the original kernel after restart

Use unmae -a to see that the kernel is already 3.13 kernel

Then change GRUB_TIMEOUT to 0

Or uncomment GRUB_HIDDEN_TIMEOUT=0

Well, the kernel compiled by myself replaces the original kernel.

Compile ubuntu kernel

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