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

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RHEL 6 : ISCSI Administration Series : Configuring Shared ISCSI Storage

  This is a continuation post to our ISCSI administration series in RHEL6 ( here are the links to my previous posts  RHEL 6 – ISCSI Administration Series – Configuring ISCSI Server and Client &  RHEL 6 – ISCSI Administration Series – ISCSI Lun resize  ). This...

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Eleven Reasons that causes INIT: Cannot create /var/adm/utmpx – Solaris

The utmpx and wtmpx files are extended database files that have superseded the obsolete utmp and wtmp database files.  The utmpx database contains user access and accounting information for commands such as who, write, and login. The wtmpx database contains the history of user access and...

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RHEL6 – KVM Administration CookBook – Part 1

I believe, this is one of the long pending post from me. Anyway, before proceeding with the actual cook book first let’s briefly recollect the concept of virtualization.  Virtualization is noting but creating an abstraction layer in between the Operating System and Hardware , so that the physical hardware...

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Quick Fix – Trouble to boot from San Lun in Solaris 10 on Sparc

It is common for Server environments to configure boot disks on external disks so that they can be easily migrated/moved for different reasons. During those scenarios, sometime we will have trouble to boot from the SAN devices and we will encounter with below kind of errors....

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Savings Plan for System Admin – It’s about Time, not Money.

  There are several techniques that how an UNIX administrator can save his time during his regular job, and few of the techniques are like writing effective automation scripts for daily routine jobs, installing handy little desktop tools which helps for easy and quick access to...

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Unix Admin Reference – RAID ( Redundant Array of Independent Disks )

  1.  What is RAID?   RAID is an acronym for Redundant Array of Independent Disks. A RAID system consists of an enclosure containing a number of disk volumes,    connected to each other and to one or more computers by a fast  interconnect. Six levels of RAID are...

 
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