The less, more, sort and sed commands are text processing commands. A word processor, or textual document preparation system, is an application used for producing (composition, editing, page layout, or formatting, possibly printing) of any type of material for printing. The UNIX more command prints the contents of a file on the screen. The file is printed on a page-by-page basis, so it also...
A compiler is a software or an array of software, that translates the text of a program written in a source language into another computer language called target language. The original source is usually called source code and the object code result. The name “compiler” is used for a program that translates from a high-level language into a low-level language. A program that performs...
Asymmetric cryptography is a type of cryptography that uses a pair of keys: a public key and a private key. A user holding such a pair publishes their public key so anyone who wants to use it to send them an encrypted message. Only the private key holder is the one who can decrypt the encrypted message. In 1874, a book written by William Stanley Jevons described the relationship between non...
In the field of Linux system administration, the shell is the main communication interface between the user and the operating system. Any computer user interacts with the shell at some point. Whether it appears in the form of tiny icons or in the form of a prompt that prompts you to type commands, the shell is the first interface an operating system offers to its users. An operating system kernel...
NetBSD is a complete, free, secure, portable operating system, belonging to the BSD and UNIX family, available on many platforms, from 64-bit Opteron CPUs to desktop computers or embedded systems. Its simple structure and source code quality make it very suitable for production environments, research, or dedicated systems. System resources are available to any user. NetBSD has a packet repository...
A browser or browser is a software application that allows users to display text, graphics, video, music and other information on a World Wide Web page but also to communicate with the information provider and even to them. A browser can be defined as a virtual internet navigator that reads scripts and pages written in a wide variety of programming languages. Therefore, instead of the word...
A virtual machine is a program that emulates a computer inside the user’s operating system. VirtualBox is a full-purpose emulator for x86 hardware. It is the only professional virtualization solution that is also Open Source Software. Virtual Box is an application that aims to help us when we need a computer that meets certain hardware and software specifications quickly and easily. Thus...
In order to facilitate the management of virtual machines, an interaction library has been developed in the form of libvirt, a management tool through which we can manage platform virtualization. This tool provides a common programming interface for multiple technologies (KVM, LXC) being used by most open-source Cloud technologies (OpenStack, oVirt). For network administrators, a console called...
Slackware Linux is one of the first Linux distributions. Since the first release, Slackware has maintained and continues using simplicity, stability, and operational safety as the main features. It does not try to rival with Windows, and it is just trying to be the best Linux possible. Among the Slackware followers, there is a word, “when you know Slackware, you know Linux but when you know...
XHTML or eXtensible HyperText Markup Language is a markup language that has the same expressive capabilities as HTML, but with a stronger syntax. XHTML can be considered as the cross between HTML and XML in many ways, being a rewriting of HTML in XML. XHTML 1.0 has become a World Wide Web Consortium (W3C) recommendation on January 26, 2000. Practically XHTML is a modern replacement for the older...