Solved: Why Linux Server rebooted when all LUN paths failed ?
Today in this article, we will see an interesting issue what i faced on one of the production server which got rebooted automatically during a SAN switch replacement activity. ...
Tag: kernel
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What is hung task and how to panic our RHEL/centos system when a task remains hanged for specific period of time ?
The hung task is detected by linux kernel by parsing processes with uninterruptible sleep state(which are waiting for some event or resource and is usually not going to move forward)...
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How to see Kernel Package level on Solaris 10 and Solaris 11 ?
Today we will see how to check out kernel package level in Unix – Oracle Solaris 10 and 11. Checking Kernel Package Version in Solaris I. Using PKG Command root@ngeui742:~#...
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Solved: libvirt: Storage Driver error : internal error: storage volume name ‘XXX.ngelinux.com_disk1.qcow2’ already in use.
Today we will see how to correct one of the common error message seen when we try to add a virtual machine in KVM on RHEL server. Lets try to...
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Solved: Not able to see console after POST in Redhat Enterprise Linux or Centos.
Some Linux Operating Systems, or RHEL versions sometimes disable console video and you might be not able to see remote console after POST. This happens due to a kernel issue...
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Meaning of the value stored in /proc/sys/kernel/panic file ?
Today we will look at an interesting topic to understand the meaning of value stored in /proc/sys/kernel/panic file. I. File Path /proc/sys/kernel/panic II. Meaning The value stored in this file...
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How to identify if our linux kernel is build with a specific option or not, for example if cgroup option is enabled during kernel build or not ?
Sometimes when you browse solution to some issue, you might have seen “make sure your kernel supports —- option i.e. during its build, this option is specified and enabled ?”...
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What is the meaning of 0 in /proc/sys/kernel/ctrl-alt-del file in Linux ?
Do you know what is the meaning of value stored in /proc/sys/kernel/ctrl-alt-del file ? Let us have a look at it. I. Meaning of default values [root@ngelinux kernel]# cd /proc/sys/kernel...
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Difference between RHEL 5, RHEL 6, and RHEL 7.
Today we will look at the between RHEL5, 6 and 7 version or you can say CentOS 5, 6 and 7 versions. I have gone through multiple sites, however not...
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How to setup kdump in Linux to collect crash dump ?
Kdump also known as Kernel dump i.e. the contents of our system memory when our kernel was crashed. Kdump is configured and collected when we want to debug why our...