Posts Tagged ‘Red Hat Linux’
Reason to Learn Linux | Linux Certifications
There are currently four programs that enable people to become certified as Linux Systems Administrators. These programs are offered by the Computing Technology Industry Association, the Linux Professional Institute, the Novell Corporation, and Red Hat, Inc. The first two are professional industry associations whose certification programs don’t rely on any specific Linux distribution. Novell and Red Hat Linux certifications are closely associated with their popular Linux distributions. Should you wish to prepare for either of these two certifications you will definitely need access to their Linux version.
Why anybody willing to start preparing Linux certifications on a limited version of Linux? The answer is simple – certification is not to be taken lightly. Do not make a major financial and time investment unless you know that you really want to be certified and that you possess the required skill set. It is not difficult to find schools that promise you success in Linux certification and in any of their course offerings. But Linux certifications may not be for you. Do not make a major certification investment only to find that it was not what you thing. Work your way through my tutorials including the suggestions for going further. Get your hands on a variety of Linux books. I would start with books designed for learning Linux and for running Linux systems before working with Linux certification books.
What’s involved in obtaining a Linux Certification? You must pass one or more extensive tests that demonstrate your prowess in dealing with the typical and some atypical problems faced by Linux systems administrators. We’ll take a closer look at the CompTIA Linux+(TM) Certification, the one often recommended as the first certification for people new to Linux. This certification does not apply to any specific Linux version. The test is designed to validate the knowledge of individuals with a minimum of six to twelve months of practical Linux experience. According to the Computing Technology Industry Association, professionals achieving the CompTIA Linux+ certification can explain fundamental management of Linux systems from the command line, demonstrate knowledge of user administration, understand file permissions, software configurations, and management of Linux-based clients, server systems, and security. Many of these functions are available on Damn Small Linux.
The Linux+ certification is a basic, entry-level certification for Linux system administrators. It is intended for people with six-months experience installing, operating and maintaining Linux operating systems. To achieve Linux+ certification, candidates must pass the 98 question Linux+ exam which covers seven areas: Planning and Implementation; Installation; Configuration; Administration; System Maintenance; Troubleshooting; and Identify, Install and Maintain System Hardware. This multiple-choice exam costs about $232 and is a good starting point for those who want to continue with other Linux certifications including those from Novell and Red Hat.
Don’t be satisfied with running computer exercises in your mind, and nodding your head at the appropriate times. To succeed you must do the exercises on a computer running Linux. Since installation is a component of all Linux Certification exams don’t stint on installing several versions of Linux on your computer. An external USB hard drive is not very expensive. Try to make friends with someone who knows better than you how to do things. Ask a lot of questions. And good luck!
And while you’re working on your certifications take a look at some of Damn Small Linux’s other advantages in our final article in this series.
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Red Hat Linux Ls Command
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Red Hat Linux – Using the Linux ls Command to List the Contents of A Directory
The Linux ls command is one of the most commonly used commands. It is used to list the contents of a directory and show the files and other directories in a directory.
In the Windows world, a Linux directory is called a Windows folder.
There are lots of options that can be used with the ls command to see different information on the files and directories that are in a directory.
Running the Linux ls Command with Examples of Options
You can run the following Linux ls command examples at the command line prompt to get real, practical commands training experience!
Linux Commands Training Tips: When you run the ls commands below, with the examples of ls command options and parameters, don’t type in the $ (dollar sign) prompt. Just type in the commands shown at the right of the $ sign.
Run the ls command without any options to see the contents of the current directory.
- $ ls
Run the ls command with the -l option for “long” option to see a longer and more detailed listing of the current directory.
- $ ls -l
Now run the command below and add the -a option to show “all” files (which will cause the normally hidden files to appear) in the current directory.
- $ ls -la
The ls command below shows the contents of the root directory. Many of the directory names that appear in the / (root) directory are common to all Linux distros. Notice that a directory named sbin (for superuser binaries) appears.
- $ ls /
Now list the contents of the sbin directory.
- $ ls /sbin
Now get a “long” listing of the sbin directory.
- $ ls -l /sbin
The next ls command shows the contents of sbin sorted by size (due to the upper case S option), with the largest file at the top. You can see the size of items in the fifth column from the left. And you can click on the scroll bar on the right side of the terminal emulation window to scroll up!
- $ ls -lS /sbin
Now see the files in reverse order, due to the -r option.
- $ ls -lSr /sbin
And now add the h option for “human readable” to cause a file with a size of 7,169 to appear as 7k.
- $ ls -lSrh /sbin
The ls command is one of the GNU Linux commands, which are the “core” Linux commands that are common to ALL Linux distributions. Many people start considering on using free linux as option to their operating system. To learn linux red hat commands you can choose fedora to get the enterprise feel on linux.
By learning the GNU Linux commands, you learn how to use ALL Linux versions!
By the way…do you want to learn exactly how to use Linux and run red hat Linux commands for Linux System Administration and get real, practical Linux training experience by running hundreds of examples of Linux commands? Stay tune as I will add more linux commands in this web site.
Priyo Wibowo | IT Consultant
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