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This article mainly explains "how to use the Linux kexec command". Friends who are interested might as well take a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use the Linux kexec command.

The Linux common commands the kexec command is a patch to the Linux kernel that allows you to boot directly from the currently running kernel to a new kernel.

Kexec boots from the currently running kernel to a new kernel

Add that in the boot sequence described above, kexec skips the entire bootloader phase (part 1) and jumps directly to the kernel we want to boot to. There is no more hardware restart, no firmware operation, no boot loader involved. Completely avoids the weakest link in the boot sequence-firmware. The greatest benefit of this feature is that the system can now be restarted extremely quickly.

The benefits of kexec: systems that require high availability, as well as kernel developers who need to constantly restart the system, will benefit from kexec. Because kexec skips the most time-consuming part of the system reboot (that is, the stage in which the firmware initializes the hardware), the reboot becomes very fast and availability is improved.

Syntax kexec (option) option-l: specify kernel image file;-e: allow currently loaded kernels;-f: force immediate system call "kexec" instead of "shutdown";-t: specify the type of new kernel;-u: unload the current kexec target kernel. At this point, I believe you have a deeper understanding of "how to use the Linux kexec command". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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