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No more obsolete linux training

Tuesday, September 14th, 2010

Without proper guidance, we are like a hen without head. It walks, it runs but without any direction and aim.

After graduation, you must be confused and want to do something that gives a tremendous growth and proper direction to your career.

Is it true?

What is Linux? Is it worth to invest?

As we all know, Linux is an operating system through which computer operator access application and devices to perform certain tasks.

Linux software works like an intermediate, lets take an example,- Operating system (Linux) receive instruction from application and forward it to processor and once processor done the assigned task, it again send back the results to application via Operating system.

You must be wondering what your role is in this whole process? Well, here it comes.

Linux and your career- Explore and experience

Before exploring career opportunities for you in Linux training, let’s take a glimpse of Linux usage in order to clarify the scene.

Today we have lots of other operating systems also that have tarnished the popularity of Linux as they seem more users friendly.

But truth is something else. All other OS such as windows or OS X has a defined criteria and can be used in  defined computer devices whereas Linux is compatible with all desktop OS, server OS and all other genre of devices very well.

I hope now you get that you career will grow drastically if you link it up with a Reliable Linux training institute.

Need of trustworthy Linux training Institute

A mentor is someone who can change the tenor of your career and life with his experience and expertise, same with GRRAS.

GRRAS organizes excellent Linux training session that will cover all latest and advanced topics of Linux in order to make you a complete Linux administrator who can fix up all the problems of a Linux based computer system or server in no time.

Its Linux Networking & system administration course will enable you to configure all sort of common network service and security administration that’s using Linux.

Its time to boost up your career with latest and advanced Linux course, as they only can smarten up the effigies of you and your dreamed career.

Red Hat Certified Virtualization Administrator (RHCVA) in India

Monday, July 26th, 2010

Red Hat Certified Virtualization Administrator (RHCVA) is a certification program for virtualization administrators and is performance-based, like all other Red Hat Certifications.

Virtualization provides greater IT efficiency and reduces capital & operational costs, by running multiple operating systems within a single server system. Cost and operational efficiencies make virtualization a hot favorite to data centers and other businesses, thus creating a huge demand for Virtualization Administrators.

Red Hat Certified Virtualization Administrator (RHCVA), through its hands-on skills assessments approach, ensures that system administrators (virtualization administrators) are knowledgeable and skillful enough to design, implement and manage virtual environments successfully.

One advantage to RHCVA certification is that it is focused and comprises of only one module.

  • RH318 – Red Hat Enterprise Virtualization

RHCVA exam (EX318) & Pre requisites

The RHCVA certification can be attained by clearing a half-day exam (EX318 – Red Hat Certified Virtualization Administrator Exam), where participants are required to demonstrate their skills in the presence of a Red Hat Examiner.

Pre requisite for RHCVA :

  • RH133 Red Hat Linux System Administration or equivalent experience with Linux or
  • System administration experience on Microsoft Windows ® operating systems beneficial,
    but is not necessary for this course.

RHCVA Training Course & Study Guide

Red Hat provides an official RHCVA Study Guide (Click Here for details), and recommends to attend the RH318 Red Hat Virtualization Administration training course.

For the first time in India, GRRAS  now offers RHCVA Training.

Transit Security

Saturday, April 10th, 2010

Currently, there are no systems in wide use that will keep data secure as it transits a public network. Several methods are available to encrypt traffic between a few coordinated sites. Unfortunately, none of the current solutions scale particularly well. Two general approaches dominate this area:

Virtual Private Networks: This is the concept of creating a private network by using TCP/IP to provide the lower levels of a second TCP/IP stack. This can be a confusing concept, and is best understood by comparing it to the way TCP/IP is normally implemented. In a nutshell, IP traffic is sent across various forms of physical networks. Each system that connects to the physical network implements a standard for sending IP messages across that link. Standards for IP transmission across various types of links exist, the most common are for Ethernet and Point to Point links (PPP and SLIP). Once an IP packet is received, it is passed up to higher layers of the TCP/IP stack as appropriate (UDP, TCP and eventually the application). When a virtual private network is implemented, the lowest levels of the TCP/IP protocol are implemented using an existing TCP/IP connection. There are a number of ways to accomplish this which tradeoff between abstraction and efficiency. The advantage this gives you in terms of secure data transfer is only a single step further away. Because a VPN gives you complete control over the physical layer, it is entirely within the network designers power to encrypt the connection at the physical (virtual) layer. By doing this, all traffic of any sort over the VPN will be encrypted, whether it be at the application layer (such as Mail or News) or at the lowest layers of the stack (IP, ICMP). The primary advantages of VPNs are: they allow private address space (you can have more machines on a network), and they allow the packet encryption/translation overhead to be done on dedicated systems, decreasing the load placed on production machines.

Packet Level Encryption: Another approach is to encrypt traffic at a higher layer in the TCP/IP stack. Several methods exist for the secure authentication and encryption of telnet and rlogin sessions (Kerberos, S/Key and DESlogin) which are examples of encryption at the highest level of the stack (the application layer). The advantages to encrypting traffic at the higher layer are that the processor overhead of dealing with a VPN is eliminated, inter-operability with current applications is not affected, and it is much easier to compile a client program that supports application layer encryption than to build a VPN. It is possible to encrypt traffic at essentially any of the layers in the IP stack. Particularly promising is encryption that is done at the TCP level which provides fairly transparent encryption to most network applications.

It is important to note that both of these methods can have performance impacts on the hosts that implement the protocols, and on the networks which connect those hosts. The relatively simple act of encapsulating or converting a packet into a new form requires CPU-time and uses additional network capacity. Encryption can be a very CPU-intensive process and encrypted packets may need to be padded to uniform length to guarantee the robustness of some algorithms. Further, both methods have impacts on other areas (security related and otherwise- such as address allocation, fault tolerance and load balancing) that need to be considered before any choice is made as to which is best for a particular case

Exam Dates
At GRRAS Linux Institute, Jaipur
RHCSA and RHCE: 8 Dec, 17 Dec, 28 Dec
EX-333: 10 Dec, 20 Dec, 30 Dec
EX-429: 17 Dec, 30 Dec
Ex-423: 18 Dec, 27  Dec
RHCVA: 16 Dec, 30 Dec
For jaipur call or e-mail :
Tel: +91-141-3136868 , +91- 9887789124 , +91-9352767438
Email: info@grras.com
At GRRAS Linux Institute, Nagpur
RHCSA and RHCE: 8 Dec, 17 Dec, 28 Dec
EX-333: 9 Dec, 21 Dec, 30 Dec
EX-429: 18 Dec, 30 Dec
Ex-423: 18 Dec, 27 Dec
RHCVA: 16 Dec, 30 Dec
For nagpur call or e-mail :
Tel : + 91 9975998226
Email: info.nagpur@grras.com
At GRRAS Linux Institute, Pune
RHCSA and RHCE: 8 Dec, 17 Dec, 28 Dec
EX-333: 9 Dec, 21 Dec, 30 Dec
EX-429: 18 Dec, 30 Dec
Ex-423: 18 Dec, 27 Dec
RHCVA: 16 Dec, 30 Dec
For Pune call or e-mail :
Tel : 02032396868
Email: info.pune@grras.com


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