Linux Community Magazine

Professional Computer Certification

Professional computer certification documents you completing the steps and acquired the knowledge to perform at a specified level as an IT professional. Certification proves to clients, co-workers and employers that your expertise is confirmed by a recognized industry organization. Today, virtually every technology professional can benefit from a well-chosen certification. Becoming certified can increase your salary, enhance your skills and make your job more satisfying.

There are several specific situations where I've found computer certification in general to be of benefit. By requiring you to study to pass an exam, even just a multiple choice test, a certification course provides better knowledge retention than the traditional corporate training course where one simply tries to stay awake for up to a week to get one's ticket punched. Another is where you have related experience and are moving (or were moved) into a new environment. In my case I was re-orged from a Unix-centric to a Windows-centric IT environment. Getting a Microsoft System Administrator cert definitely helped come review time. Finally, if you have a discrimination issue, such as the common one that as an older tech worker you're skills aren't up to date. If push comes to legal shove human relations people, lawyers, and judges do take evidence of continuing education very seriously.

Why a Linux certification?

The number of job ads calling for some knowledge of Linux has risen by nearly 100% over the last year. On the other hand the number of applicants choosing Linux certification hasnt risen proportionally. Part of the reason for this anomaly is that employers generally havent put much faith in Linux certifications and therefore there has been little demand for them. Also, many of the Linux jobs advertised are for more senior and technical roles such as programmers and developers skills that far outweigh the level that are tested on some Linux certification tracks. All that appears to be changing however, with Linux becoming ever more mainstream and people with Linux skills becoming more in demand.

Will Linux certification land me a job?

While actual work experience with Linux or any computer technology will always count for so much more than any piece of paper, gaining Linux certification certainly wont do your credentials any harm. The demand for credentials in everyfield, computer-related or not, is increasing and one has to keep up with the pack. Having that certification ticket punched may not make your resume stand out in a positive way, but not having it might make it stand out in a negative one.Large bureaucratic IT organizations take them more seriously than groovy startups if that's the environment you're looking to work for.

Which Linux certification?

There are several options to choose from and, given the amount of time and money that youll need to invest into gaining your Linux certification, youll want to be sure that you make the right certification track choice to begin with.

For those new to Linux then the entry-level, vendor-neutral certifications offered by CompTIA and LPI the best choice. However, these involve only multiple-choice tests and as a result have rather less credibility with technical managers.

If you are already working with Linux then one of the proprietary Linux certifications (Red Hat, Novell) would be better suited. Like the respected Cisco certifications these certs involve rigorous hands-on practical exercises under severe time constraints and have much more credibility with technical managers. They are also more expensive, especially if you have to retake the test, as almost 50% of Red Hat wannabes fail the first time around.

Given that there are numerous distributions of Linux available one problem of Linux certifications is that there is no central organization that can set the certification standards and ensure that the candidates meet those standards. What this meansis that you have quite a degree of freedom to choose which certification track is right for you, but you equally need to be sure that the one you choose will meet your end needs. As with any other certification track that you take, Linux certifications can be taken by way of instructor led courses or you can undertake a regime of self-study on your own. Dont get too bogged down on deciding which distribution is better or is more likely to result in a job at the end of the day. While there are obvious differences between the various Linux distributions a degree of competency in one flavour will set you up to transition to the others if need be at a later stage.

John Reece

There are some situations in Linux operating system where you can not mount the file system and logical volumes to access data from it. It specifically occurs in dual boot systems. When you attempt to repair the file system on your root partition, the process gets failed. In such situations, you system becomes inaccessible. When you try to repair your disk and file system without L, it does not work and gives you the following error message:Leonzwei root # xfs_repair -nLv /dev/hdc3Phase 1 - find and verify super block...Bad primary super block - bad magic number!!!Attempting to find secondary super block...Found candidate secondary super block...error reading super block 54 -- seek to offset 57982058496 failedunable to verify super block, continuingCauseThis problem occurs due to errors or corruption into the Super Block of your Linux file system. Due to corruption in the super block, the file system can not be mounted and thus the system does not start. Super Block is th e most important part of Linux file system which contains a complete description of the size, shape, type and all other important information related to file system. This information is sued by the file system manage to manage your Linux file system. In such situations, you may face the critical problems of data loss from your Linux computer. At this point of time, the only thing which can save you and your data is the data recovery Linux. Linux data recovery is the process of retrieving your inaccessible data from the failed Linux hard drive. It is possible using the data recovery software know and Linux recovery software. Linux recovery software provides easy interface for the user to handle even the severe data loss situations. Data recovery Linux software are made available by a number of data recovery companies. You should always go for the best Linux recovery software to ensure absolute Linux data recovery. Stellar Phoenix Linux Data Recovery software is the ultimate s olution of all your Linux data loss worries. With interactive and cool looking user interface, this software allows you to have easy and smooth Linux recovery from all flavors of Linux operating system. It is a read only and non destructive data recovery Linux software.

Boot loaders such as GRUB (Grand Unified Bootloader), LILO (Linux Loader) etc. enable you to select to boot a particular operating system in multiboot or dual boot systems. After selecting the operating system (for example Linux), the booting process initially starts with the booting of Linux Kernel program. A Linux Kernel program is the central component of a computer operating system. It requires the corresponding drivers to access the device on which the file system is based. To avoid any conflict due to all imaginable drivers in the kernel, it uses initial ramdisk (intrd). The intrd is the temporary file system, which is mostly used for preparations before the real root file system can be mounted. Problems might occur when intrd gets loaded before Linux Kernel program. In such situations, the hard drive volume becomes un-mountable and the data saved in the hard drive becomes inaccessible. In such situations, you need to recover your data from the latest backup. In case , no backup is available or the backup is corrupted, you need to use efficient Linux Data Recovery applications to recover your lost data files.

Consider a practical example, when you attempt to boot Linux operating system, you encounter the below error message:

Must load Linux kernel before initrd

The above error message occurs each time you try to boot the Linux operating system on your computer. After the above error message appears, the data saved in the Linux volume becomes inaccessible.

Cause:The above error message mainly occurs when the intrd gets loaded before the Linux Kernel program.

Resolution:

To resolve the above error and access the data, you need to remove the intrd from your computer. However, if you still encounter an error, then only option left is to access the volume by reinstalling the Linux operating system. A clean reinstall of the operating system will erase all previously stored data in the hard drive. In such scenarios, you need to recover lost data by using effective Linux Data Recovery software. These advanced recovery applications incorporate high-end scanning methods to recover lost data from a logically corrupted hard drive.

Stellar Phoenix linux data recovery serves the purpose of providing reliable and easy Linux Data Recovery. This read only Linux Recovery software supports Ext2, Ext3 and ReiserFS file systems. It gets installed on Windows (Vista, XP, 2003 and 2000) and the affected Linux drive should be connected as slave.

How to Play Poker Online On Linux Using A Windows Poker Client?Have you ever thought about playing poker on your Linux machine? This is quite easy as you simply need to install proper packages like kpoker or sillypoker from your Linux distribution'sstore and you are done. However, if want to play poker online for real money, then this may not be as easy as it sounds.There are many MS Windows poker clients available on the internet but the problem is that none of them is a native poker client for a Linux operating system. A few of them just need a Java plugin installed in your browser but there are many online poker clients which you need to install on your Linux machine before playing. In this article, you will learn how to play poker online on Linux using Windows Poker Clients. To play poker online on linux using a windows poker client, you need to install a wine application. Wine is a software program through which you can run and install windows based poker clients on y our linux machine and play poker online easily. Here is what you need to do to test this method: Install wine application Install Windows based poker online client using wine Run Windows based poker online client using wineHow to Install Wine on Your Linux Computer? In case you are using Linux operating with a debian package management ( DEB ) like Debian or Ubuntu, you need to install wine using an apt-get command

# apt-get install wine

NOTE: apt-get will need root privileges! If you are using RedHat with redhat package management ( RPM ) and its follows up Fedora or CentOS, you need to install wine using an yum install command:# yum install wineNOTE: yum will need root privileges!

How to Install Windows Based Poker Client On Linux?

After installing and running the wine application, you need to download a windows based poker poker client like Poker Stars and install it using wine.NOTE: Do not run a following command as a root user. PokerStars application will be installed locally into your home directory as specified by a bash's $HOME environment variable.$ wine PokerStarsSetup.exeIf you are running wine for a first time, then it may ask you some questions. Otherwise, just install Poker Stars application normally as you would on Windows Operating System. Before running a Windows based poker client, you may need to run the wineboot utility to simulate a Windows reboot:$ winebootHow to Install Windows Based Poker Client On Linux?Now you can start a Windows based Poker client from your linux desktop menu. In case you dont see a shortcut to a Wine->PokerStars in your linux desktop menu, you can run this application using the following command:$ cd ~/.wine/drive_c/Program Filesthen find a PokerStars instal lation directory and executable file and run it using the following wine command:$ wine ~/.wine/drive_c/Program Files/PokerStars/PokerStars.exe

Important Note: Running a Windows based Poker Online Client successfully using wine is not guaranteed! There are many factors concerning the successful run of native MS Windows applications on the Linux operating system. If you fail to start your preferred online poker client on your Linux machine, then you must install the latest version of wine or a CrossOver Software which is a commercial version of wine.

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