How to Install OpenCV on CentOS 8

OpenCV (Open Source Computer Vision Library) is an open-source computer vision library with bindings for C++, Python, and Java and supports all major operating systems. It can take advantage of multi-core processing and features GPU acceleration for real-time operation.

OpenCV is used for a very wide range of applications, including medical image analysis, stitching street view images, surveillance video, detecting and recognizing faces, tracking moving objects, extracting 3D models, and much more.

This article describes how to install OpenCV on CentOS 8. To install the latest stable version of OpenCV from source, scroll down to the Installing OpenCV from the Source section of this tutorial. Choose one of the installation options that works best for you.

#opencv #python #centos

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How to install PgAdmin 4 on CentOS 8

pgAdmin is the leading graphical Open Source management, development and administration tool for PostgreSQL. pgAdmin4 is a rewrite of the popular pgAdmin3 management tool for the PostgreSQL database.

In this tutorial, we are going to show you how to install pgAdmin4 in Server Mode as a web application using httpd and Wsgi module on CentOS 8.

Install pgAdmin4 on CentOS 8

**01-**To install pgAdmin4 on CentOS 8 we need to add an external repository, so execute the following command:

$ sudo rpm -i https://ftp.postgresql.org/pub/pgadmin/pgadmin4/yum/pgadmin4-redhat-repo-1-1.noarch.rpm

02- After we add the pgAdmin4 repository, let’s use the below command to install pgAdmin4 as server mode:

$ sudo dnf install pgadmin4-web

03- Before proceeding with the configuration of pgAdmin4, we need to install policycoreutils tool:

$ dnf install policycoreutils-python-utils  

04- Once we done installing pgAdmin4, we need to configure the pgAdmin4 by setting up the initial pgAdmin user account

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Laravel 8 CKEditor Tutorial Example

Laravel 8 CKEditor tutorial example. In this tutorial, you will learn how to install and use CKEditor in laravel 8.

Basically, there is two way to install and use CKEditor in laravel 8 app. But in this tutorial, we will show you a simple example of how to install CKEditor in laravel 8 app.

How to install CKEditor In Laravel 8 App

• Step 1: Install Laravel 8 App
• Step 2: Connecting App to Database
• Step 3: Create Post Model & Migration
• Step 4: Add Fillable Property in Model
• Step 5: Make Route
• Step 6: Create Controller
• Step 7: Create Blade Views File
• Step 8: Start Development Server

https://www.tutsmake.com/how-to-install-ckeditor-in-laravel-8/

#how to install ckeditor in laravel 8 #laravel 8 install and use ckeditor example #how to install and use ckeditor in laravel? #laravel 8 integrate ckeditor with example #how to install & integrate ckeditor (wysiwyg) in laravel 8

How to Install Security Updates on CentOS 8

Keeping your Linux system up-to-date is a very critical task, especially when it comes to installing security updates. This ensures that your system stays safe, stable, and keeps you on top of the latest security threats.

In this short and precise article, we will explain how to install security system updates on a CentOS 8 Linux system. We will show how to check for system updates (for all installed packages), updates for a specific package, or security updates only. We will also look at how to install updates either for a specific package, for all installed packages, or security updates only.

First, log into your system and open a terminal window, or if it is a remote system, access it via ssh. And before you move any further, take note of your the current kernel version on your system:

# uname -r

Check Current Kernel Version

Checking Security Updates for CentOS 8 Server

To check if there are any updates available, issue the following command on the command prompt. This command non-interactively checks whether there are any updates are available for all packages on your system.

# dnf check-update

Check CentOS 8 Updates

If you want, you can check updates for a specific package, provide the package name as shown.

# dnf check-update cockpit

Check Updates for Package

Checking Security Updates for Installed Software Packages

You can determine if there are security-related updates or notices available, using the following command. It will show a summary of security notices displaying the number of updates in each category. From the screenshot below, there is 1 security update available for us to install on the test system.

# dnf updateinfo

Check Notices for Security Updates

To show the actual number of security packages with updates for the system, run the command that follows. Although there is only 1 security update as indicated in the output of the previous command, the actual number of security packages is 3 because the packages are related to each other:

# dnf updateinfo list sec
OR
# dnf updateinfo list sec | awk '{print $3}'

#centos #security #centos tips #centos-8

How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

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How To Install PyCharm on CentOS 7 and 8

PyCharm is an IDE (or Integrated Development Environment) for the Python programming language. It is a cross-platform development environment that is compatible with Windows, macOS, and Linux. It provides a tool that integrates code analysis, graphical debugging, unit testing, and also contains an integrated terminal that supports development on remote hosts and virtual machines.

PyCharm was created by JetBrains based on the IntelliJ IDEA platform. There are two main versions of PyCharm.

The PyCharm Community Edition – This version is used for development without the framework options and other features that are necessary for writing Enterprise solutions.
The PyCharm Professional Edition – This version is used to develop software for large projects where frameworks and additional libraries are needed. This version contains support for Scientific and Python development and supports HTML, JS, and SQL.
For successful developers, it is crucial to have excellent tools that lessen their workload and save time. Additionally, PyCharm utilizes various plugins and extensions, written by both IntelliJ IDEA and other third-party contributors to increase functionality. The Professional Edition has a free trial period during which users can familiarize themselves with it and its use or the open-source Community Edition which allows for continued free usage.

#centos #centos 7 #centos 8 #code analysis #cross platform