关于kdump
kdump是在系统崩溃、死锁或者死机的时候用来转储内存运行参数的一个工具和服务。
检查kdmp是否开启
ulimit -c 如果输出为 0 ，则代表没有打开。如果为unlimited则已经打开。
停止kdump服务
systemctl stop kdump.service systemctl disable kdump.service
修改grub文件
vim /etc/default/grub 将crashkernel=auto修改为crashkernel=0
生成配置并重启
grub2-mkconfig -o /boot/grub2/grub.cfg reboot
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