# 修改内核启动顺序
x86_64 centos：
cat /boot/grub2/grub.cfg |grep "menuentry"

grub2-set-default 'CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)' 

arrch64 中标麒麟：
cat /boot/efi/EFI/neokylin/grub.cfg | grep menuentry 
grub2-set-default 'NeoKylin Linux Advanced Server (4.14.0-115.5.1.el7a.06.aarch64) V7.0 (Chromium)'

# 查看修改的内核是否生效

grub2-editenv list