vps 热切换内核版本

[tiancheng91]

https://anisse.astier.eu/distro-kernel-scaleway-arm.html

apt install kexec-tools

#!/bin/sh
if grep -q is_in_kexec=yes /proc/cmdline; then 
        exit 0
fi
kexec -f --ramdisk=/initrd.img --append="$(cat /proc/cmdline) is_in_kexec=yes root=/dev/vda1" /vmlinuz