• Welcome to Bashguru

    Linux is one of popular version of UNIX operating System. It is open source as its source code is freely available. It is free to use. Linux was designed considering UNIX compatibility. It's functionality list is quite similar to that of UNIX and become very popular over the last several years. Our Basic motive is to provide latest information about Linux Operating system.

  • Python Programming

    Python is a comparatively simple programming language, compared to c++. Although some of the benefits of c++ are abstracted away in python, they are replaced with an overall easier to learn language with many “intuitive” features. For this reason it is common and recommended by most professionals that people new to programming start with python.

  • Perl Programming

    Perl is an open-source, general-purpose interpreted programming language. Used often for CGI, Perl is also used for graphics programming, system administration, network programming, finance, bioinformatics, and other applications. The Perl languages borrow features from other programming languages including C, shell scripting (sh), AWK, and sed. They provide powerful text processing facilities without the arbitrary data-length limits of many contemporary UNIX command line tools, facilitating easy manipulation of text files.

  • Android

    Android is an operating system based on the Linux kernel, and designed primarily for touch screen mobile devices such as smart phones and tablet computers. Android is a Linux-based software system, and similar to Linux, is free and open source software. This means that other companies can use the Android operating developed by Google and use it in their mobile devices.Android gives you a world-class platform for creating apps and games for Android users everywhere, as well as an open marketplace for distributing to them instantly.

Monday, March 31, 2008

Posted by venu k
2 comments | 10:57 PM
No programming language is perfect. There is not even a single best language; there areOnly languages well suited or perhaps poorly suited for particular purposes.
UNIX is simple. But It just needs a genius to understand its simplicity.
--Dennis Ritchie
We will be using Bash, an acronym for "Bourne--Again shell" developed by Brian Fox and Chet Ramey. Bash has become a de facto standard for shell scripting on all flavors of UNIX. Bash is the standard GNU shell, intuitive and flexible. Probably most advisable for beginning users while being at the same time a powerful tool for the advanced and professional user. On Linux, bash is the standard shell for common users. This shell is a so-called superset of the Bourne shell, a set of add-ons and plug-ins. This means that the Bourne Again shell is compatible with the Bourne shell. commands that work in sh, also work in bash. However, the reverse is not always the case. Bash is the POSIX compliant.

Shell is a command language interpreter that executes commands read from the standardInput device(key board) or from a file. Shell is not part of system kernel, but uses the system kernel to execute programs, create files etc. Normally shells are interactive. An interactive shell generally reads from, and writes to, a user's terminal: input and output are connected to a terminal.

The UNIX shell program interprets user commands, which are either directly entered by the user, or which can be read from a file called the shell script or shell program. Shell scripts are interpreted, not compiled.Writing shell script is not hard to learn. The syntax is simple and straightforward, similar to that of invoking and chaining together utilities at the command line, and there are only a few rules to learn. Most short scripts work right the first time, and debugging even the longer ones is straightforward. Shell script is just like batch file in MS-DOS but have more power than the MS-DOS batch file. Shell scripts useful to create our own commands that can save our lots of time and to automate some task of day today life. Using shell scripts we can automate system administrative tasks it saves lot of time


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