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Compiling and Installing the Kernel

  1. Compile the kernel.
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    # cd /usr/src/linux-kernel-5.15.98/
# sudo make -j64

    If the following information is displayed during the compilation, ensure that the server system time is the latest time:

    Run the tzselect command and enter the numbers corresponding to the following options in sequence: Asia->China->Beijing Time->YES. After the command is executed, copy the file to /etc/localtime.

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    # tzselect
# sudo cp /usr/share/zoneinfo/Asia/Beijing /etc/localtime
  2. Check whether the kernel is compiled successfully.
    Check whether a vmlinux file is generated in the compilation path. If a vmlinux file is generated, the compilation is successful. You can proceed to the next step. If not, check whether an error is reported during compilation, rectify the fault, and perform 1 again.
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    # ll vmlinux*
-rwxr-xr-x 1 root root 42919136 Mar 22 03:31 vmlinux*
-rw-r--r-- 1 root root 64101280 Mar 22 03:30 vmlinux.o
-rw-r--r-- 1 root root   678152 Mar 22 03:30 vmlinux.symvers
  3. Compile kernel modules.
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    # sudo make modules -j64
  4. Install the modules.
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    # sudo make modules_install
  5. Install the kernel.
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    # sudo make install
  6. Update the boot items.
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    # sudo update-grub2

    Restart the OS for the new kernel to take effect.

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    # sudo reboot
  7. Check the version of the new kernel. If the version is 5.15.98, the correct kernel is imported.
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    # uname -a
Linux ubuntu 5.15.98 #2 SMP Wed Mar 22 03:30:54 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux