SShell script wrappers can make the *nix command more transparent to the user. The most common shell scripts are simple wrappers around the third party or system binaries. A wrapper is nothing but a shell script or a shell function or an alias that includes a system command or utility.
Linux and a Unix-like operating system can run both 32bit and 64bit specific versions of applications. You can write a wrapper script that can select and execute correct version on a 32bit or 64bit hardware platform. In clustered environment and High-Performance computing environment you may find 100s of wrapper scripts written in Perl, Shell, and Python to get cluster usage, setting up shared storage, submitting and managing jobs, backups, troubleshooting, invokes commands with specified arguments, redirecting stdout/stderr and much more.
In this post, I will explain how to create a shell wrapper to enhance the primary troubleshooting tool such as ping and host. [continue reading…]
Boxes command is a text filter and a little known tool that can draw any kind of ASCII art box around its input text or code for fun and profit. You can quickly create email signatures, or create regional comments in any programming language. This command was intended to be used with the vim text editor, but can be used with any text editor which supports filters, as well as from the command line as a standalone tool. [continue reading…]
An bash shell alias is nothing but the shortcut to commands. The alias command allows the user to launch any command or group of commands (including options and filenames) by entering a single word. Use alias command to display a list of all defined aliases. You can add user-defined aliases to ~/.bashrc file. You can cut down typing time with these aliases, work smartly, and increase productivity at the command prompt. [continue reading…]
Firefox version 13.0 has been released and available for download. Firefox 13.0 is the fastest and smartest web browser. You will see new tab and home page user interface. The Home Page now includes icons at the bottom of the page to give you easy access to bookmarks, history, settings, add-ons, downloads and sync preferences with one-click shortcuts. This version is a major upgrade and includes features such as updated developer tools, SPDY, and few other updates. [continue reading…]
I already written about howto remove a password from all PDF files under Ubuntu or any other Linux distribution in a batch mode. However, many user want a simple command to recover password from pdf files. This is useful if you forgotten your password for pdf file. It is also useful for data-archaeologists, computer forensics professionals, people who want to test their password-strength (pdf files generated by webpass) and many more. [continue reading…]
Linux operating systems come with a various set of tools allowing you to manipulate the Wireless Extensions and monitor wireless networks. Here is a list of Linux tools used for wireless network monitoring tools that can be used from your laptop or desktop system to find out wifi network speed, bit rate, signal quality/strength, and more. [continue reading…]
As the reader of this site you are our most important critic and commentator. I value your opinion and want to know what I’m doing right, what I could do better. Understanding your background and professional experience will help me make this site more interesting and relevant to you and other readers of this site. What types of additional content would you most like to see on nixCraft? Videos? Cutting edge technologies like cloud computing? We don’t ask this of our readers often but we are hoping to enlist your help in helping us to get to know you better. The better we know you the better we can serve your needs.
Undeletion means restoring files which have been deleted from Linux ext3 file system using rm command. Deleted files can be recovered on ext3 file systems using the debugfs program. This quick tutorial describes how to recover a file that was recently deleted using nothing but standard Linux command line utilities. [continue reading…]
You can create URL redirection service for your blog within five minutes using nothing but web server’s mod_redirect module. For example, when you type or share a url io9.in/t/5159 you will be automatically redirected to http://www.cyberciti.biz/tips/my-10-unix-command-line-mistakes.html. In this quick post I will explain how to create url shortener and integrate your wordpress based blog without installing any new scripts. [continue reading…]