Archives for June 2023

“factor” is a command-line utility that calculates and prints the prime factorization of a given number. Prime factorization is the process of expressing a number as a product of its prime factors, which are the prime numbers that divide the given number without leaving a remainder. When you run the “factor” command followed by a […]

“f3read” and “f3write” are two utilities that work in conjunction to validate and test the real capacity of a storage drive, such as a flash drive or a microSD card. These tools use special test files with the “.h2w” extension to perform their operations. The purpose of “f3read” is to validate the integrity of the […]

“f3probe” is a utility used to probe a block device, such as a flash drive or a microSD card, to detect counterfeit flash memory. It is a tool designed to verify the authenticity and true capacity of storage devices, particularly those that may be falsely labeled or sold as higher-capacity devices than they actually are. […]

“f3fix” is a tool designed to edit the partition table of a fake flash drive. Fake flash drives are counterfeit devices that appear to have a larger storage capacity than they actually possess. These drives are often sold at lower prices, enticing buyers with the promise of high storage capacities at a fraction of the […]

“Exrex” is a powerful tool that allows you to generate matching strings for a given regular expression. It provides the ability to generate all possible matching strings or generate random matching strings based on the provided regular expression pattern. Additionally, “exrex” can simplify regular expressions, making them more concise and easier to manage. Regular expressions […]

The “expr” command in a shell environment is a versatile utility that allows you to evaluate expressions and perform string manipulation. It is primarily used for numerical calculations and string operations within shell scripts or directly from the command-line interface. When it comes to numerical calculations, “expr” can handle basic arithmetic operations such as addition, […]

Expose is an open-source tunneling application that facilitates the sharing of websites or web applications over the internet. It provides a secure and convenient way to expose local web servers to the public, allowing others to access and interact with the hosted websites or applications. The primary purpose of Expose is to eliminate the complexities […]

The “export” command in shell environments allows you to mark shell variables to be exported to any newly created child processes. When a process is forked, meaning a new child process is created, it inherits a copy of the parent process’s environment variables. By using the “export” command, you can specify which variables should be […]

“expand” is a command-line utility that performs a simple yet useful task: converting tabs to spaces in text files. It is designed to enhance readability and ensure consistent formatting by replacing tab characters with a specified number of spaces. In many programming languages and text editors, tabs are often used for indentation purposes. However, the […]

Exiv2 is a powerful command-line tool and library specifically designed for manipulating metadata in image files. Metadata, often referred to as “exif” data in the context of images, contains important information about the image file itself, such as camera settings, date and time of capture, location data, and much more. The primary purpose of Exiv2 […]