Shell Script Wrapper Examples: Enhance the Ping and Host Commands

Posted on in Categories Linux, Shell scripting, UNIX last updated January 31, 2016

Shell script wrappers can make the *nix command more transparent to the user. The most common shell scripts are simple wrappers around third party or system binaries. A wrapper is nothing but a shell script that includes a system command or utility.

Linux and 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 cluster 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, sending stdout to stdout and stderr to stderr and much more.

In this post, I will explains how to create a shell wrapper to enhance the basic troubleshooting tool such as ping and host.

Linux / Unix Desktop Fun: Text Mode ASCII-art Box and Comment Drawing

Posted on in Categories Linux, Linux desktop last updated June 19, 2012

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 tied to any text editor which supports filters, as well as from the command line as a standalone tool.

Linux / FreeBSD: PDFCrack A Command Line Password Recovery Tool For PDF Files

Posted on in Categories FreeBSD, Linux, Linux desktop, Security last updated June 6, 2012

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.

8 Linux Commands: To Find Out Wireless Network Speed, Signal Strength And Other Information

Posted on in Categories Linux, Linux desktop, Linux laptop last updated June 6, 2012

Linux operating systems comes with various set of tools allowing you to manipulate the Wireless Extensions and monitor wireless networks. This is a list of tools used for wireless network monitoring tools that can be used from your laptop or desktop system to find out network speed, bit rate, signal quality/strength, and much more.

Linux debugfs Hack: Undelete Files

Posted on in Categories Linux last updated June 5, 2012

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.

Linus Torvalds Wins Millennium Technology Prize

Posted on in Categories Linux, News last updated August 7, 2016

Linus Torbalds
The Millennium Technology Prize is the largest technology prize in the world and it is awarded once every two years by Technology Academy Finland. The Awarded is given for life-enhancing technological innovation. Linux kernel creator Linus Torvalds and Dr. Shinya Yamanaka won the Millennium Technology Prize, the prominent award for technological innovation for 2012.