[LINUX] Rebuild kernel on Ubuntu 20.04 (on Azure)

There was a procedure in the Software Design article below, so I tried it for the first time in a while. In the article, it was Ubuntu 18.04 on Hyper-V, but I tried it on Ubuntu 20.04 on Azure VM. This is my first kernel compilation on Azure.


Status before installation

$ uname -r

Required packages


1. Download kernel source

$ git clone -b v5.5.5 --depth 1 https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux-stable
$ cd linux-stable

2. Make the necessary settings for the build based on the current kernel status.

$ make localmodconfig

For the time being, I just try everything by default, so hit the Enter key repeatedly.

3. Build

$ make -j$(grep -c processor /proc/cpuinfo) bindeb-pkg

It's not accurate because I was working on it separately, but about 30 minutes on the Standard D2s v3 instance?

4. Kernel and module installation

$ sudo dpkg -i ../linux-image-5.5.5_5.5.5-16_amd64.deb

5. Grub settings

It's not necessary if you just reboot and try a new kernel, but if you want to go back, see the manual.

6. Reboot and check

$ sudo /sbin/reboot

$ uname -r


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