The Solution: First, I make confirm that key-based authentication is working as I was able to log in with the ssh key provided by the AWS console. After that, I created a new key with type ecdsa. Open a terminal and generate a new key-pair: Once the key is generated, add the public key to remote servers ~/.ssh/authorized_key file. Now, I can successfully connect to the remote server with FileZilla over SFTP....

This article explores five common ways to combine strings in your Bash scripts and programs. Keep reading to learn more about concatenating strings in Bash and which method is best for your specific situation. Concatenate Strings The simplest way to combine strings in Bash is to use the double-quote (“ ”) character. You can enclose your strings within double quotes and combine them to form a single string. This is useful for combining short strings that don’t require any special formatting....

In this quick troubleshooting guide, I will try to help you to resolve this issue. Solution Most of the popular operating systems contain the Tkinter library in their default repositories. Which can be installed using the system’s package manager. Use one of the following commands to install the Python Tkinter library based on the operating system. On Debian-based Linux (Ubuntu, Debian, Pop!_OS):sudo apt-get install python3-tk On Arch-based Linux systems:sudo pacman -S tk On CentOS, RedHat, and Oracle Linux systems:sudo yum install -y tkinter tk-devel On Fedora-based Linux systems:sudo dnf install python3-tkinter...

In this tutorial, we will learn how to call a function in Python. We will discuss the different ways you can pass arguments to a function, and we will also look at some common mistakes to avoid when calling functions in Python. Calling function in Python In Python, you can call a function by using its name followed by a pair of parentheses and optionally passing some arguments to the function inside the parentheses....

In this article, we will look at how to connect to a MySQL database in Python using the mysql-connector-python library, which is a MySQL driver for Python. We will also cover some basic operations such as creating tables, inserting data, and querying the database. Prerequisites Before we begin, you will need to install the following: Python 3: You can download and install Python from the official website (https://www.python.org/). Make sure to install the latest version of Python....

If your system is facing issues like system running out of memory frequently and you don’t want to increase physical memory. Then this is the best idea to add Swap memory on your system. Remember, swap memory is good but much slower than physical memory. This tutorial will help you to create a swap file on the Linux system and use it as swap memory. How to Create Swap in Linux Here is the step by step tutorial to create a swap file on the Linux machine and configure in the system....

With authentication enabled on your MongoDB instance, you can set specific rules about what user accounts are permitted to do and what sort of access they have. This also means that you can also lock down certain features so that only authorized users have access to them. In this article, we will show you how to enable authentication in MongoDB so that only authorized users can access the database and its contents....

To get directory path only use dirname(FILE). For example to include other file in same directory use: Later the PHP version 5.3.0 and later versions introduced a new constant called DIR which is the short form of the dirname(FILE). You can also use this in replacement of what we used earlier. Now, you can use above script like: To simply print the absolute directory path of PHP script located in:

You can use the conda binary for package management with your Python applications. Which will provide you with a better environment for faster development. In this step-by-step tutorial, we will help you to install Anaconda on your Fedora Linux system. Prerequisites Login to your Fedora system and open a terminal. Generally, the curl package is default installed on the Fedora system. Execute the following command to install or update the curl package on your system....

As it is installable on all major Unix operating systems, in this article we will provide a step-by-step guide about how to install and configure Postfix on Ubuntu 20.04. How to Install Postfix on Ubuntu Step 1. The first step in installing Postfix is to update our system packages by typing or copying the following command in Debian 11 terminal and then pressing enter: Step 2. Now that we have successfully updated our package index, let us continue by typing the following command in our Ubuntu Terminal which will install Postfix on Ubuntu 20....

Step 1 – Prerequsites Login to your Debian system using root or sudo privilege user and update the current packages to latest version. Step 2 – Install Node.js Bower required Node.js to be installed on the system. Use following set of commands to add node.js PPA on your Debian system and install. Make sure you have successfully installed node.js and NPM on your system Step 3 – Install Bower on Debian After installation of node....

This article will help you to install Ionic framework CLI tool on your CentOS 8 and RHEL 8 systems. Step 1 – Install Node.js Ionic required Nodejs to be installed on your system. The systems don’t have installed Nodejs use following commands to install Node.js 12.x version on your system. You can visit our tutorial to install latest Node.js on CentOS and RHEL systems. Step 2 – Install Cordova After installing nodejs, run the following command to install Cordova on your system using npm command....

This article explain you to how to install Linux, Apache, MySQL and PHP (LAMP Stack) on Ubuntu 18.04 (Bionic Beaver) Linux Systems. Let’s begin: Prerequisites You must have root or sudo privileged user access to your Ubuntu 18.04 system. Login to your Ubuntu system using GUI for Desktop and SSH for the server edition. Now upgrade current packages to latest version. Step 1 – Installing Apache2 After installing PHP on your system, let’s start the installation of Apache2 in your system....

Prerequisites Login to your Fedora system and open a terminal. Now upgrade the current packages to the latest version by running the following command. After that run the following command to install the MySQL 5.7 packages on your systems. This will also install all other required dependencies. Press ‘y’ when prompt for the confirmation to complete installation. Once you start the MySQL server for the first time, an auto-generated password is set for the root account....

Step 1 – Setup Yum Repository First, you need to enable MySQL yum repository in your system provided by MySQL. Execute one of the below commands as per your operating system version. Step 2 – Install MySQL Community Server The MySQL yum repository contains multiple repositories configuration for multiple MySQL versions. So first disable all repositories in mysql repo file. Then execute one of the followings commands as per your operating system to install MySQL....

Prerequsities The newly installed system’s recommended to follow initial server setup. Shell access to the CentOS 8 system with sudo privileges account. Step 1 – Install Nginx The Nginx packages are available under the default AppStream repository. You can simply update the DNF cache and install Nginx web server packages using the following commands. After installation of packages starts Nginx service, Also enable Nginx service to auto-start on system boot....

Step 1 – Prerequisites You must have fulfilled all the prerequisites for installing Python on Ubuntu, Debian and Linuxmint. Use the following command to install all the prerequisites. After that go for the Python installation on Ubuntu. Step 2 – Download Python 3.5 Download Python source code archive from its official download website. You can also download Python 3.5 version using the following commands. Now extract the downloaded archive on your system....

Step 1 – Installing Erlang RabbitMQ requires Erlang to be installed on the system. So first of all, You can simply download the erlang repository package from its official website and install it on your system. Run the following commands to update the Apt cache and install Erlang packages. Step 2 – Install RabbitMQ Server After installing the requirements, now enable RabbitMQ apt repository on your system. Also, you need to import rabbitmq signing key on your system....

Oracle VirtualBox 6.1 is the latest major version launched by the Oracle team. The latest updates come from time to time. At the time of updating this tutorial, VirtualBox 6.1.16 is the latest available version to install. You can read the ChangeLog to know more about changes in newer version’s of VirtualBox. This tutorial described how to install VirtualBox on Ubuntu 20.04 LTS (Focal Fossa) Linux systems. Prerequisites First of all, upgrade the current packages on your system....

For example, a script that clears the log files from the system. The script first checks the size of the log file, if the log file size is lower than the specified size, the script exits. In that case, you still want to run a block of code. To do this, we can use the trap command to catch the EXIT signal and execute a command or function. Below is the sample shell script to run a function or command on shell script exit....