Tag: UNIX

Why Should We Go For Linux!

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Linux is a Unix-like operating system that was designed to provide personal computer users a free or very low-cost operating system comparable to traditional and usually more expensive UNIX systems. Linux has a reputation as a very efficient and fast-performing system. Linux (often pronounced LIH-nuhks with a short “i”) is a Unix-like operating system that was designed to provide personal computer users a free or very low-cost operating system comparable to traditional and usually more expensive UNIX systems. Linux has a reputation as a very efficient and fast-performing system. Linux’s kernel (the central part of the operating system) was developed by Linus Torvalds at the University of Helsinki in Finland. To complete the operating system, Torvalds and other team members made use of system components developed by members of the Free Software Foundation for the GNU Project.
Linux is a remarkably complete operating system, including a graphical user interface, an X Window System, TCP/IP, the Emacs editor, and other components usually found in a comprehensive UNIX system. Linux is distributed using the Free Software Foundation’s copy left stipulations that mean any modified version that is redistributed must in turn be freely available. The below mentioned features gives Linux a winning edge once compared to most Operating Systems.
Linux is reliable
Linux runs on your existing machines
Linux is free and requires no costly add-ons
Free Support for lifetime
Linux has no Registry
You don’t need to restart Linux
Linux has no SIDs
Linux has no licensing mechanism
The GUI is optional
Extremely low space required for operations
Linux is multi-platform
Linux uses open protocols
Linux integrates with NetWare
Linux integrates with Windows networks
Linux integrates with Macintosh networks
Linux is a good career move

The head office of Rooman Technology for Linux training is in Bangalore, the highly efficient institute for fulfilling requirements of IT industries, for those who are seeking to get a bright future in computer and IT professionals. It has been considered as the No.1 training company and its Regional branch is in Delhi which provides the same efficiency as the Head office. It has been said that Rooman Technology will open about 100 branches very shortly.
It provides both the full time and part time courses for the candidates. Full time courses are of 10 months and the part time courses are of 5 months. Anyone who seeks to get better knowledge in any source of networking can go for these courses as the rate of fees are quite reasonable and even gives assurance for required placements.

Linux Certification to Strengthen One’s Resume

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Linux is a clan of operating systems similar to UNIX, based and is fast emerging as an embedded platform for many netbooks and smartphones. The use and development of Linux is at a demanding rate and this comes with an added demand for professionals who are adept at Linux. A Linux certification is always a bonus in such a scenario to display one’s aptitude in the Linux operating system. Linux training is always helpful for future job prospects and is an added feature in one’s resume. Many companies and franchises provide Linux certification courses to help one harness his/her Linux skills.

Many companies provide certification programs in Linux throughout the country. Rates and duration may depend from franchise to franchise and also upon location and the level of additional experience provided. Almost all course providers have an assessment oriented curriculum wherein the candidate is tested with regular or a final exam to display his/ her competence at the Linux language and showcase his skills. Many companies also offer certain experience to their applicants, as a part of their Linux certification courses, by engaging them some or the other practical work.

A beforehand practise or working experience is always a tag to carry around in case one is interested in Linux administration; it is bound to increase further job prospects. Companies may provide a complete training course or domain specific training in Linux. Course content may vary but mostly consists of in depth knowledge of Linux installation and process, network and group management etc. All courses are professionally formulated keeping in with the latest trends and technology.

A Linux Certification has undoubtedly many advantages to professionals and amateurs alike. Linux Training always increases your value and status as a Linux administrator and as a programmer. It gives one a chance to display his/ her expertise at this fast developing operating system. A certification course in Linux is an ideal place to start learning Linux at a deep knowledge level and it also provides one with the right platform to fast pace or jump start one’s career in Linux administration. A lot of companies and enterprises employ professionals practised at Linux and project them as a selling tool for better market acquisition. A certification in Linux morally boosts the morale of IT personnel who have to make extensive use of the related technology.

Linux An Introduction

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Linux is a free, UNIX work-alike designed for Intel processors on PC architecture machines. Linux is not UNIX, as UNIX is a copyrighted piece of Aware that demands license fees when any part of its source code is used. Linux was written from scratch to avoid license fees entirely, although the operation of the Linux operating system is based entirely on UNIX. It shares UNIX’s command set and look-and-feel, so if you know either UNIX or Linux, you know the other, too.

Linux supports a wide range of software, from TeX (a text formatting language) to X (a graphical user interface) to the GNU C/C++ compilers to TCP/IP networking. Linux is also compliant with the POSIX.1 standard, so porting applications between Linux and UNIX systems is a snap.

New users of UNIX and Linux may be a bit intimidated by the size and apparent complexity of the system before them. There are many good books on using UNIX out there, for all levels of expertise ranging from novice to expert.

However, few (if any) of these books cover, specifically, the topic of using Linux. Although 95 percent of using Linux is exactly like using other UNIX systems, the most straightforward way to get going on your new system is with a book tailored for Linux.

Types of Linux:

Following are the main types of Linux which are available:

The various distribution types in Linux.

The types of disk sets for each distribution.

Which distribution sets are important for you

How to look for files on the CD-ROM.

How to get Linux from FTP sites.

How to get Linux from BBS sites.

How to find FTP sites where you can get Linux updates

Linux Distribution:

Several versions of Linux are available, depending on which CD-ROM or FTP site you visit. You can change kernel versions by obtaining the source code for a new release, compiling it, and replacing your existing kernel. You may find several CD-ROM distributions available at your local reseller. Info Magic’s Slack ware release, for example, comes on Your CD-ROMs and bears the name Linux Developer’s Resource. In addition to the complete Linux system, it includes source code, FTP archives, full documentation, several extension products, and demonstration software of commercial applications (including WordPerfect)

Starting Linux:

Starting the Linux system can be as simple as turning on the power switch of your PC. If Linux is configured to auto load, Linux will be up and running after a few seconds. Few systems are set up to run only Linux, though, and even fewer have it boot automatically when the power is turned on. Although automatic startup is convenient, many Linux users prefer to be able to choose which operating system to boot into (if other operating systems are loaded on the system) or to change the . level of access to Linux. You can start a Linux system by using a boot floppy disk or using LILO in one of several configurations.

Linux Based Products Linux Web Hosting

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Since its inception in the early 60s, a number of computers have been running on Linux operating system. However, since its launch numerous advances had to be made before it became serious competition for Windows and several other hosting servers. Since a few years, offsite Linux web hosting has been much more readily accessible. Products based on Linux have been gaining immense popularity since a few years.

Linux hosting is basically a type of web hosting where the server software namely Php, Mysql etc is installed on open source Linux operating system. What this means is that the software and all the updates are completely free of cost. The best thing about Linux is its flexibility and capability to work across all platforms; you can use it in any way you want. In simple terms, Linux is to operating systems what .pdf formatting is to document control.

Despite the fact that Linux for desktop computers and notebooks’ is still somewhat unusual, there are several genuine tech savvy users out there in the market who have learned long ago that Linux eradicates a lot of of the problems that Windows users have grumbled about for numerous years. On the other hand, Linux based products have turned into one of the best business standards over the past decades and numerous businesses have incorporated Linux operating systems into their systems and used Linux servers almost entirely.

One of the foremost features of Linux is its ability to work across all platforms. Moreover, when we speak about Linux hosting, a company that proffers Linux compatibility has most likely at some point shifted from UNIX or still includes UNIX in its offerings. Numerous analysts have stated that Linux is in reality the result of high performance operating system standards that created its footing initially in the mid 1980s.

Furthermore, as with any kind of compatibility problem, any business using Linux will be required to source out and reference check a hosting company that is capable to grant not only Linux servers , but can also supply the ideal technical support which Linux based products require. Additionally, the hosting company should also provide sufficient backup that is obligatory in order to accomplish Linux mission which is proper server hosting.

Hence, make sure that if you want to use Linux based products you should select the best hosting company which is compatible with Linux. Meanwhile, for the masses, Linux itself may be the most appropriate operating system. However, its intrinsic requirement for a support organization to learn yet one more operating system factually inside and out is a bit wobbly at best.

So in order to trust your Linux files to an offsite Linux web hosting company makes sure their technical support group has been properly licensed in the particulars of Linux’s use. Linux hosting platforms are extremely speedy and don’t have any lagging problems. With Linux, quick change of details or a database change is likely very possible.

When you are using a Linux hosting company you will observe that there is no limit on the disk space that you consume. Hence, for all of you who have multiple pages, the unlimited disk space feature is quiet handy. There is also no limit on the amount of broadband that is used, this makes your website very fast and you automatically gain an edge over your rivals. Linux hosting also offers limitless SSH access. In simple terms, SSH is a secured network protocol that permits you to send files or network commands to the server through a secure line. For all those looking for a web hosting solution, Linux is a great choice.

The Concept of Limits in a Linux System

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Every UNIX based system like Linux has a certain set of limitations on the kind of feature sets and resources that can be used by a program or user. This can range from simplistic models like the complete length of file’s path, to the kind of arguments and calls that a program can have.

Since these limits effectively reduce the scope and abilities of a program, an application trying to be portable across different UNIX implementations needs to account for varying limit standards. The Single UNIX Specification’s third version (SuSv3, in short) defined three discrete functions that an application could call to determine the limits of the system it was working on – fpathconf(), pathconf() andsysconf(). It also defined a limit range that a UNIX implementation could enforce. The most crucial part of this set range was a minimum limit. This particular limit would be set as a constant in the limits header file, with a name that begun with the _posix_ string. If an application could stick to the specified minimum limits, it would manage to be portable across most implementations in all likelihood. However, that would result in a loss of functionality that higher limit values would bring in. This made determining the limits of a system using sysconf() etc. particularly invariable. This function was also a great tool to determine runtime invariant and increasable values.

A function like pathconf(), on the other hand, deals with the name of file paths. Limits on these pathnames could be determined using functions like fpathconf() and pathconf(). Limits can also be ascertained through shell commands. The getconfcommand can help you determine the limits in the UNIX implementation you are currently working on.

During runtime, sysconf() can tell you the limits you need when you specify the name of the limit in the function’s argument. If the limit cannot be determined, or there is an error of any sort, the function will return a value of –1′. SuSv3 dictates that the value returned by the function has to be constant all through the calling.

The difference between pathconf() and fpathconf() is the method of specifying the file/directory. In the case of the former, the pathname needs to be specified, while for the latter, a previously opened file descriptor is required. SuSv3 does not require these functions to return values than remain constant all through an entire process runtime. This lets a file system to be mounted and dismounted multiple times, all while the process is running.

Indeterminate limits are ones that are not defined by an implementation limit constant. The functions stated above would end up returning –1′ to indicate the indeterminacy of the limits required. These hindrances can be handled in a number of ways – the most practical of them being to avoid the checking of limits, and instead perform the corresponding library function calls. If those calls fail too, the errnomust be checked to judge whether some other system limit was violated, so that you can modify the program behavior accordingly.

You should avoid hardcoding system limit assumptions into your programs, as it may not be valid across every file system or UNIX implementation. Using the necessary functions, SuSv3 can guide you to make your program adapt even in real-time.