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

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Linux Admin Reference – NTP Configuration and Troubleshooting – Red Hat Enterprise Linux :

NTP stands for Network Time Protocol, and it is an Internet protocol used to synchronize the clocks of computers to some time reference. NTP is an Internet standard protocol originally developed by Professor David L. Mills at the University of Delaware. Time usually just advances. If you have communicating programs running on different computers, time still...

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DevOps Series – Automation with puppet – Part4

Understatanding Puppet Manifests Puppet instructions or programs are called manifests. Manifests are generally stored in files with the .pp extension. We learned about resources earlier and manifests are actions with resources. Below code shows a manifest that can be used to add a file to a system...

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Introduction to Hadoop

Hadoop is a platform that is well suited to deal with semi-structured & unstructured data, as well as when a data discovery process is needed. That isn’t to say that Hadoop can’t be used for structured dara that is readily available in a raw format; because...

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VxVM : Resolving the Intermittent Disk errors by clearing the failing flag on a disk

If I/O errors are intermittent rather than persistent, VxVM sets the failing flag on a disk, rather than detaching the disk. Such errors can occur due to the temporary removal of a cable, controller faults, a partially faulty LUN in a disk array, or a disk...

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