Jan 2017

red hat linux

what is red hat linux operating system ?

Red Hat Enterprise Linux, or RHEL is the enterprise – grade version of  Red Hat’s open source Linux operating system distribution. Red Hat Enterprise Linux can be deployed on both servers and desktops, and it competes in the enterprise Linux market with the likes of SUSE Linux Enterprise, Oracle Linux and Cent OS.


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red hat linux certification course

  • Red Hat Certified System Administrator (RHCSA)
  • Red Hat Certified Engineer (RHCE)
  • Red Hat Certified Architect (RHCA)
  • Red Hat Certified Virtualization Administrator (RHCVA)
  • JBoss Certified Application Administrator (JBCAA)

What is Linux?

Just like Windows XP, Windows 7, Windows 8 , and Mac OS X , Linux is an operating system. An operating system is software that manages all of the hardware resources associated with your desktop or laptop. To put it simply the operating system manages the communication between your software and your hardware. Without the operating system (often referred to as the “OS”),the software wouldn’t function.

The OS is comprised of a number of pieces:

The Boot loader: The software that manages the boot process of your computer. For most users this will simply be a splash screen that pops up and eventually goes away to boot into the operating system.


The kernel: This is the one piece of the whole that is actually called “Linux” The kernel is the core of the system and manages the CPU memory, and peripheral devices. The kernel is the “lowest” level of the OS.


Daemons: These ate background services (printing, sound, scheduling, etc) that either start up during boot, or after you log into the desktop.


The Shell: you’ve probably heard mention of the Linux command process that allow you to control the computer via commands typed into a text interface . This is what, at one time, scared people away from Linux most (assuming they had to  learn a seemingly archaic command line structure to make Linux work) This is no longer the case. with modern desktop Linux, there is no need to ever touch the command line.



Graphical Server: This is the sub-system that displays the graphics on your monitor. it is commonly referred to as the X server or just “X”.


Desktop Environment:  This is the piece of the puzzle that the users actually interact with. There are many desktop environments to choose from (Unity, GNOME, Cinnamon, Enlightenment, KDE, XFCE, etc). Each desktop environment includes built – in applications (such as file managers , configuration tools, web browsers, games etc.)


Applications: Desktop environments do not offer the full array of apps. Just like Windows and Mac, Linux offers thousands upon thousands of high – quality software titles that can be easily found and installed. Most modern Linux distributions (more on this in a moment) include App Store – like tools that centralize and simplify application installation. For example: Ubuntu Linux has the Ubuntu Software Centre (Figure 1) which allows you to quickly search among the thousands of apps and install them from one centralized location.


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