Sed stands for stream editor It was based on the scripting feature of ed(a line based interactive text editor in Unix). It is used to perform basic text transformation on the input stream either it is from a file or input from a pipeline. The sed was developed in 1973-74 by Lee E. McMahon of … Read more
Standard streams In Linux programming, standard streams are preconnected input-output communication channels between the computer program and environment in which the program gets executed. There are three types of I/O communication channels i.e standard input (stdin), standard output(stdout), and standard error(stderr). This input or output can be redirected to or from a text file using … Read more
Bootscreen A bootscreen is a graphical representation of the boot process of an operating system. It can be scrolling boot messages in a console or virtual terminal or it can be a combination of both. Bootscreen enhances the user experience. It can also display some errors if the operating system is unable to boot in … Read more
Command-line interface(CLI) is a way that allows users to interact with computer programs through commands. A user issues commands to a program which gets interpreted by a command-line interpreter. Most operating system implements CLI in the form of shells that are used for interactive access of the various services or functions of the operating system. … Read more
Videoder APK is an Android app that allows users to download YouTube videos to the phone. Not only this, but the Videoder app on Android is also known to provide music, gaming, Live news videos etc. YouTube app on Android allows a user to download some video (and not all) but that video only stays … Read more
Software Repository A software repository(also called ‘repo’) is the database of software packages stored on a remote server. The server also contains metadata of packages. Generally, these packages are retrieved by using a package manager in the local machine. When you install a distribution of Linux it comes with a pre-configured default repository to download … Read more
Linux is a multiuser operating system where many number of users can access different files and directories at the same time. Access to all the files is managed using file permission, attribute, and ownership. Ownership makes sure which user(s) can access, and file permission ensures what operations can be performed by different group of users. … Read more
Grub Grub is a bootloader that is used to manage the multiple operating systems installed on a computer. A boot loader is the first program that runs when a computer starts. It is responsible for loading and transferring control to the operating system’s kernel. The GNU GRUB is derived from the GRand Unified Bootloader, which … Read more
The yum and dnf are the command line package management utilities that can be used for installation, updating, and removal of a software package. These are used in the CentOS, Fedora, and other similar Linux distributions. Centos is a community-supported distribution designed as an opensource version of RHEL(Red Hat Enterprise Linux) while fedora is another … Read more
Software Package A software package is an archive file of compiled and built source code with necessary metadata for its deployment. The metadata of the package consist of dependencies, package version, and about the software. For example – the .deb packaging is used for Debian based Linux Distributions while .rpm packaging is used in Red Hat, … Read more
A process is an instance of a computer program that is currently running. A program can have multiple instances created when it starts executing which means more than one process can be associated with that program. Multitasking is the method by which these processes share the system resources. Whenever we execute a command on terminal … Read more
In Unix or Unix based operating systems, a shell is a program that interprets the command and acts as an intermediary between user and kernel. There are different types of shells are available on different Unix based systems. These all have similar functionality but different syntax and capabilities. You can automate a task by writing … Read more