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

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Manual Installation of RHEL6 from DVD

Let’s start with a typical installation of Red Hat Enterprise Linux on a Virtual Box Step 1. Create a new virtual machine in VirtualBox, with 384MB of RAM, and name it RHEL01. Step 2. Make sure that the installation CD is in the drive (or attached...

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‘tac’: Concatenate and write files in reverse

  ‘tac’ copies each FILE (‘-‘ means standard input), or standard input if none are given, to standard output, reversing the records (lines by default) in each separately.  Synopsis:      tac [OPTION]… [FILE]… “Records” are separated by instances of a string (newline by default).  By default,...

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Part 2 – Mastering Grep – Regular Expressions

Using Regular Expressions with Grep A “regular expression” is a pattern that describes a set of strings. Regular expressions are constructed analogously to arithmetic expressions, by using various operators to combine smaller expressions. `grep’ understands three different versions of regular expression syntax: “basic,” (BRE) “extended” (ERE)...

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DevOps Tool – Know about Clarive

Clarive provides a highly customizable, pragmatic solution for End-to-End Lean Application Delivery at an affordable price. Its unique rule-based approach to workflow, release and deployment management, makes it adaptable to organizations of any size or release processes of any complexity without additional external scripting.

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