Hi Buland, Firstly, thanks for your comments! Executing the following commands: [root@localhost ktap]# uname -r 3.10.0-123.el7.x86_64.debug [root@localhost ktap]# rpm -q kernel-debuginfo kernel-debuginfo-3.10.0-123.el7.x86_64 [root@localhost ktap]# rpm -q kernel kernel-3.10.0-123.el7.x86_64 It seems all the versions are match. So I think it is not this issue, thanks! Best Regards Nan Xiao On Mon, Nov 2, 2015 at 3:15 PM, Buland Kumar Singh <6b65726e656c@xxxxxxxxx> wrote: > On 2 November 2015 at 09:09, Nan Xiao <xiaonan830818@xxxxxxxxx> wrote: >> >> Hi all, >> >> I am trying to use crash on RHEL 7.0.After executing "crash" command, >> it outputs: >> >> crash: cannot find booted kernel -- please enter namelist argument >> >> After referring to crash white paper >> (https://people.redhat.com/anderson/crash_whitepaper/), >> I know it needs vmlinux file. So I install "kernel-debuginfo" package: >> >> [root@localhost boot]# rpm -ql kernel-debuginfo | grep vmlinux >> /usr/lib/debug/lib/modules/3.10.0-123.el7.x86_64/vmlinux >> >> Then execute crash, it still prompts the same error: >> >> crash: cannot find booted kernel -- please enter namelist argument >> >> I try to copy vmlinux file into /boot directory, but this error still >> exists. >> >> How can I fix this issue? Thanks very much in advance! >> >> Best Regards >> Nan Xiao >> >> -- >> Crash-utility mailing list >> Crash-utility@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/crash-utility > > > > Hi Nan, > > You need to make sure that the version of kernel-debuginfo package must > match with the version of running kernel. > > Eg: > # rpm -q kernel > kernel-3.10.0-229.el7.x86_64 > > # uname -r > 3.10.0-229.el7.x86_64 > > # rpm -q kernel-debuginfo > package kernel-debuginfo is not installed > > # rpm -ivh kernel-debuginfo-common-x86_64-3.10.0-229.el7.x86_64.rpm > Preparing... ################################# > [100%] > Updating / installing... > 1:kernel-debuginfo-common-x86_64-3.################################# > [100%] > > # rpm -ivh kernel-debuginfo-3.10.0-229.el7.x86_64.rpm > Preparing... ################################# > [100%] > Updating / installing... > 1:kernel-debuginfo-3.10.0-229.el7 ################################# > [100%] > > # rpm -q kernel-debuginfo > kernel-debuginfo-3.10.0-229.el7.x86_64 > > # crash -s > > crash> sys > KERNEL: /usr/lib/debug/lib/modules/3.10.0-229.el7.x86_64/vmlinux > DUMPFILE: /dev/crash > CPUS: 2 > DATE: Mon Nov 2 12:41:58 2015 > UPTIME: 00:13:18 > LOAD AVERAGE: 0.37, 0.37, 0.18 > TASKS: 122 > NODENAME: localhost.localdomain > RELEASE: 3.10.0-229.el7.x86_64 > VERSION: #1 SMP Thu Jan 29 18:37:38 EST 2015 > MACHINE: x86_64 (2790 Mhz) > MEMORY: 2 GB > > -- > BKS > > -- > Crash-utility mailing list > Crash-utility@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/crash-utility -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
