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

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How to Deal with Incidents in Production Environment

What is Incident Management? Incident management (IcM) is a term describing the activities of an organization to identify, analyze, and correct hazards to prevent a future re-occurrence. These incidents within a structured organization are normally dealt with by either an Incident Response Team (IRT), or an Incident...

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HBA replacement in Solaris.

HBA replacement in Solaris. HBA replacement is one of the major and tricky task in Solaris as it involves the understanding of WWN. Both Old WWN (for faulty HBA) and New WWN (for newly installed HBA) are required for zoning and masking to map the HBA paths from...

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Deployment and understanding of LDOMS (Logical Domains)

Deployment and understanding of LDOMS (Logical Domains): Ldom technology allows us to allocate a system’s various resources such as memory, CPUs and devices (I/O,Networl interfaces etc) into logical groupings and create multiple, discrete systems each having their own operating system, resources, and identity within a single...

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VxVM : Veritas Disk Group Configuration – Backup and Restore

[tab name=’About Configuration Backup‘] Disk group configuration backup and restoration allows you to backup and restore all configuration data for Veritas Volume Manager (VxVM) disk groups, and for VxVM objects such as volumes that are configured within the disk groups. Using  this feature, you can recover from corruption...

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RHEL6 Installation and Security Bench Marking Recommendations – Part5

Logging and Auditing The items in this section describe how to configure logging, log monitoring, and auditing, using tools included with RHEL6. It is recommended that rsyslog be used for logging (with logwatch providing summarization) and auditd be used for auditing (with aureport providing summarization) to...

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Beginner’s Lesson – VERITAS Volume Manager for Solaris

  Veritas Volume Manager is a storage management application by Symantec ,  which allows you to manage physical disks as logical devices called volumes. VxVM uses two types of objects to perform the storage management 1. Physical objects – are direct mappings to physical disks 2 . Virtual...

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Solaris SVM: Recovery procedures when BOTH sides of the mirror indicate a "Last Erred" state

As a result of unusual failures such as multiple power failures, Solstice DiskSuite /Solaris  Volume Manager both submirrors of a metadevice mirror may be left in an unusual “Last Erred / Last Erred” state making it impossible to determine exactly which submirror must be fixed/replaced first...

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