Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base

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VxVM Troubleshooting – vxdisk list shows "online failing"

There are times that we see the disk status as “online failing” in vxdisk list output, even though the underlying hardware issue is not with the disk but with either controller or some other related hardware. Once we fix the non disk related hardware issue we...

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Solaris Troubleshooting DNS : Checking DNS settings to troubleshoot sendmail

In this post we will discuss about the commands to check DNS configuration and functions for sendmail. Follow these steps to: ensure dns client configuration is in place and enabled; verify mail exchanger lookups are successful (if using DNS for mail exchanger lookups). To resolve error...

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Basis Filesystem Management in Linux

In this doc I am trying to present base for Linux Filesystem. I tried to cover Theoratical and Pratical portition where-ever it is necessary. What is Filesystem In simple term you can say a FS is a medium to access your files/directories in any Unix Flavour....

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Solaris Troubleshooting : NFS – Hard vs Soft mounts

NFS-filesystems that are mounted read-write or that contain executable files should always be mounted with the “hard” option. Normally an application is not aware of where the data (files) it is accessing is located – it only knows the pathname.  The data could be located locally in an UFS...

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Redhat Linux : Collect System Diagnosis report for the Support Call purpose

Red Hat Enterprise Linux 4.5 and previous On a default installation the package Sysreport should be already installed. If not you need to install the package “sysreport-.rpm” with the following command # rpm -ivh sysreport-.rpm or, if your system is registered at the Red Hat Network...

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