Author: Rahul

Docker is a popular tool for packaging and deploying applications in an isolated environment, and a key part of the Docker workflow is building Docker images. We can build our own images with the help of base images and use them to create containers. We can also pull the images directly from the docker hub (https://hub.docker.com/) for our application. In this beginner’s guide, we will explain what Docker images are and how to build them. What is a Docker Image? A Docker image is a lightweight, stand-alone, and executable package that includes everything needed to run a piece of software,…

Bash functions are a handy way to group a series of commands that you often use together. They allow you to reuse code, make your scripts more organized and easier to read, and save you time by not having to type out the same commands over and over again. To create a function in Bash, you use the function keyword followed by the name of the function and a pair of curly braces that enclose the commands that make up the function. For example:

This creates a function called `greeting` that simply outputs the string “Hello, world!” when it…

While working with the Python application, you would be required to read and write text files in Python. You can refer to our other tutorial to write a text file in Python. Reading a text file in Python is a simple process that can be accomplished using a few different methods. In this article, we will cover the following methods for reading a text file in Python: Using the `open()` function and `.read()` method Using the `open()` function and `.readlines()` method Using the `with` statement and `.read()` method Using the `with` statement and `.readlines()` method You can choose anyone the…

Databases are the backbone of any data-driven application or system. They provide a systematic way to organize, retrieve, update, and manipulate data. One of the most popular databases in the world is MySQL, which is widely used for web applications and embedded database systems. Python, on the other hand, is one of the most versatile and widely used programming languages. It’s no wonder that Python and MySQL often go hand-in-hand in the development of robust applications. In this article, we are going to delve into the process of connecting Python to a MySQL database. By the end of this guide,…

In Bash, it is often necessary to check if a command succeeded or failed. For example, you may want to execute different commands based on the success or failure of a command, or you may want to perform error handling in a script. To check if a command succeeded or failed in Bash, you can examine the exit status of the command. The exit status of a command is a numerical value that indicates the success or failure of the command. A command with an exit status of 0 indicates success, and a command with a non-zero exit status indicates…

In Linux, the file permissions determine who can access and modify a file or directory. By default, the owner of a file or directory has full control over it, but it is also possible to grant or restrict access to other users or groups. If you want to change the permissions of multiple files or directories at once, you can use the `chmod` command with the `-R` option to recursively change the permissions. In this article, we will explore how to recursively change the file permissions in Linux. Syntax The basic syntax for using `chmod` to recursively change permissions is…

Generating random strings in Python is a common task that can be useful in various scenarios, such as when you need to create unique identifiers, when you want to generate random passwords, or when you want to create random data for testing purposes. In Python, you can use the random module and the string module to generate random strings. The random module provides functions for generating random numbers, and the string module provides functions for generating random strings. In this article, we will explore how to generate random strings in Python using these two modules. Method 1: Using Python `secrets`…

In Python, you can generate a random password using the secrets module, which is part of the Python standard library. The secrets module provides a secure way to generate random strings, numbers, and other values that can be used for various purposes, such as generating passwords, tokens, or unique IDs. Tips for Generating Secure Passwords: Here are a few tips to keep in mind when generating passwords: Use a strong, random password generator to create passwords that are difficult to guess or crack. Use a different password for each account or service that you use. Use long passwords that are…

Determining the filesystem type in Linux can be useful in various scenarios, such as when you want to mount a filesystem, when you want to create a new filesystem, or when you want to format a disk. There are several ways to determine the filesystem type in Linux, such as using the df, mount, or the lsblk command. In this article, we will explore these different ways to determine the filesystem type in Linux. There are several ways to determine the filesystem type in Linux. Some of the most common ways are: Method 1: Using the `lsblk` command The `lsblk`…

It is essential to monitor the disk space on a Linux server to ensure enough free space is available for new files and applications. If the disk becomes full, it can cause issues such as system crashes, data loss, and other problems. To prevent these issues, you can use a shell script to monitor the disk space and send an alert when the available space falls below a certain threshold. In this article, we will walk through the process of creating a shell script that monitors the disk space and sends an alert when the available space falls below a…