1 1.首先得安装调试符号
2 kernel-debuginfo-common-x86_64-4.18.0-240.10.1.el8_3.x86_64.rpm
3 kernel-debuginfo-4.18.0-240.10.1.el8_3.x86_64.rpm
4
5 2.安装 crash
6 yum install crash
7
8 3.安装 kdump
9 yum install kexec-tools
10
11
12 4.配置 grub
13 /etc/default/grub
14 GRUB_CMDLINE_LINUX="crashkernel=256M"
15
16 5.修改kdump默认配置/etc/kdump.conf
17 https://www.thegeekdiary.com/centos-rhel-7-how-to-configure-kdump/
18
19 6.启动 kdump 服务
20 systemctl start kdump.service
21 systemctl enable kdump.service
22
23 7.查看 kdump 服务是否启动
24 service kdump status
25
26 8.手动触发 kdump
27 echo 1 > /proc/sys/kernel/sysrq
28 echo c > /proc/sysrq-trigger
29
30 9.查看 crash,并调试
31 ls /var/crash/
32
33 10. 使用 crash 命令
34 files
35 crash vmlinux vmcore
