suse11修改如下：
1#kdump 2sed -i "s/crashkernel=[[:graph:]]*/crashkernel=256M-:512M/g" /boot/grub/menu.lst 3sed -i "s/KDUMP_SAVEDIR=[[:graph:]]*/KDUMP_SAVEDIR=\"file:\/\/\/opt\/crash\"/g" /etc/sysconfig/kdump 4sed -i "s/KDUMP_DUMPFORMAT=[[:graph:]]*/KDUMP_DUMPFORMAT=\"compressed\"/g" /etc/sysconfig/kdump 5chkconfig boot.kdump on 6mkdumprd -f
修改后需要重启生效。
注意在suse 11 sp3 kdump-0.8.4-0.29.5 修改配置后不生效，是kdump的bug。
解决方法是在修改配置文件后，运行下面命令
mkdumprd -f
bug参考：https://support.hpe.com/hpsc/doc/public/display?docId=mmr_kc-0110976
suse12 修改如下：
1#kdump 2sed -i "s/crashkernel=[[:graph:]]*high/crashkernel=512M,high/g" /etc/default/grub 3sed -i "s/crashkernel=[[:graph:]]*low/crashkernel=256M,low/g" /etc/default/grub 4sed -i "s/crashkernel=[[:graph:]]*high/crashkernel=512M,high/g" /boot/grub2/grub.cfg 5sed -i "s/crashkernel=[[:graph:]]*low/crashkernel=256M,low/g" /boot/grub2/grub.cfg 6echo "" >> /etc/default/grub 7sed -i "s/KDUMP_SAVEDIR=[[:graph:]]*/KDUMP_SAVEDIR=\"file:\/\/\/opt\/crash\"/g" /etc/sysconfig/kdump 8sed -i "s/KDUMP_DUMPFORMAT=[[:graph:]]*/KDUMP_DUMPFORMAT=\"compressed\"/g" /etc/sysconfig/kdump 9systemctl enable kdump 10systemctl start kdump 11
修改后需要重启生效。
补充知识点： 查询kdump的状态命令如下：
rckdump status
yast2 进入kdump命令如下：
yast2 kdump
将系统搞挂验证kdump命令如下：
echo c > /proc/sysrq-trigger