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Articles by Satish Kumar
Page 70 of 94
How to Use Multiple Databases with docker-compose?
Introduction Docker is a popular platform for deploying and running applications in a containerized environment. It provides an efficient way to package, distribute and run applications with all their dependencies. One of main advantages of using Docker is that it enables use of multiple databases in an efficient way using docker-compose. Docker-compose is a tool for defining and running multi-container Docker applications. It allows you to define configuration of different containers in a single YAML file, which can be used to start, stop and manage containers. In this article, we will discuss how to use multiple databases with Docker-compose. Prerequisites ...
Read MoreThe Use of Swap Space in Modern Linux Systems
Linux is a free and open-source operating system that is widely used in modern computing systems. It has a rich set of features that make it one of most popular operating systems in world. One such feature is use of swap space. Swap space is a part of Linux file system that is used to temporarily store data when computer's RAM (Random Access Memory) is full. In this article, we will discuss use of swap space in modern Linux systems, its benefits, and how to configure it. What is Swap Space? Swap space is a designated area on a hard ...
Read MoreSend stdout to Multiple Commands
Introduction When it comes to programming, there are numerous occasions when we need to execute multiple commands and take input or output from a single command. In such cases, sending output of a command to multiple commands becomes an essential task. Sending stdout to multiple commands is one of most frequently used techniques in programming. In this article, we will discuss what stdout is and how we can send it to multiple commands with examples. So, let’s get started. What is stdout? Stdout (Standard Output) is a default stream in Unix-like operating systems, which is used to display output of ...
Read MoreExecute Bash Script Directly From a URL
Introduction Bash scripting is a powerful way of automating repetitive tasks and executing complex commands with a single script. With increasing popularity of web-based technologies, it's now possible to execute Bash scripts directly from a URL. This opens up a whole new world of possibilities for web developers and system administrators. In this article, we'll explore how to execute Bash scripts directly from a URL and provide some examples to help you get started. What is Bash Scripting? Bash scripting is a type of scripting language that is commonly used on Unix-based systems such as Linux and macOS. Bash stands ...
Read MoreCommands to Get Min, Max, Median, and Mean of a Dataset
When working with datasets, it's important to understand characteristics of data. One of most fundamental aspects of a dataset is its central tendency - point around which data tends to cluster. This can be quantified in a number of ways, including minimum, maximum, median, and mean. In this article, we'll explore these different measures of central tendency and show you how to calculate them using a variety of programming languages. What is Minimum of a Dataset? The minimum of a dataset is smallest value in set. This value is useful for understanding lower bounds of data and can help identify ...
Read MoreCombine and Execute Multiple Linux Commands
Linux is a powerful and versatile operating system that has gained immense popularity in computing world. One of most useful features of Linux is ability to combine and execute multiple commands at once, which can significantly improve your productivity and efficiency. In this article, we will discuss various techniques for combining and executing multiple Linux commands, along with examples that demonstrate their practical applications. Combining Commands with Pipes The most common way to combine Linux commands is by using pipes. A pipe is a feature that allows output of one command to be passed as input to another command. syntax ...
Read MoreCommand Substitution in Bourne Shell
Introduction In world of Unix and Linux, Bourne shell is a popular and widely used command-line interface for interacting with operating system. One of most powerful features of Bourne shell is command substitution, which allows you to use output of one command as input for another. This article will explore command substitution in Bourne shell, including how it works, why it's useful, and some practical examples. What is Command Substitution? In Bourne shell, command substitution is a feature that allows you to take output of one command and use it as input for another command. This is done by enclosing ...
Read MoreHow to End Processes With kill, pkill, and killall
When working with a Unix-based operating system such as Linux or macOS, it is common to encounter situations where a process becomes unresponsive or needs to be terminated for some reason. Fortunately, there are several command-line utilities available that allow users to end processes in a variety of ways. In this article, we will explore three of most commonly used utilities for terminating processes: kill, pkill, and killall. We will cover their basic usage, common options, and examples of how they can be used to manage processes on a Unix system. Basic usage of kill, pkill, and killall Before diving ...
Read MoreConnecting From Docker Containers to Resources in Host
Introduction Docker is a popular platform that enables users to run and manage applications inside containers. Docker containers provide a lightweight and efficient way of isolating applications and their dependencies from underlying host system. However, in some cases, it may be necessary to connect from a Docker container to resources in host system. This article will discuss various ways to connect from Docker containers to resources in host. Accessing Host System By default, Docker containers are isolated from host system. This means that they cannot access any resources in host system unless specific configuration is done. following are some ways ...
Read MoreWhy Do We Use su – and Not Just su
Introduction The Linux operating system is a powerful tool that offers a wide range of features and functionalities to its users. One of most common tasks performed by system administrators on Linux systems is to switch to root user account using su command. However, in some cases, it is recommended to use su – instead of just su. In this article, we will explore reasons behind using su – and provide examples of how it can be beneficial. What is difference between su and su –? The su command is used to switch to another user account on system, typically ...
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