Author: admin

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How to Create a Self-Signed SSL Certificate

HTTPS SAN SSL
Introduction Creating a self-signed SSL certificate is a cost-effective way to secure internal websites, development servers, or testing environments. By including the Subject Alternative Name…
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SSL
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How to Install an SSL Certificate on NGINX

SSL Webserver
Introduction Securing your website with SSL is crucial for protecting user data and ensuring trust. This guide explains how to install SSL certificates on NGINX…
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SSL
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How to Install an SSL Certificate on Apache

Apache SSL Webserver
Introduction Securing your website with SSL is critical for encryption and trust. This guide explains how to install SSL certificates on Apache for Debian-based and…
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SSL
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Subject Alternative Name (SAN) – SSL Certificate

HTTPS SSL
What is Subject Alternative Name (SAN)? SAN is an extension field in an SSL certificate that allows multiple domain names or subdomains to be listed…
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SSL
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Understanding Public, Private, and Self-Signed SSL Certificates

HTTPS SSL
SSL certificates come in various forms, each suited to different use cases and security needs. In many cases, public SSL certificates are used for securing…
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SSL
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How SSL Certificate Chain Works: Understanding Full Chain Verification

HTTPS SSL
How SSL Certificate Chain Works: Understanding Full Chain Verification When a server presents an SSL certificate to a client (like a web browser), it’s not…
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SSL
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How SSL/TLS handshake Works

HTTPS SSL
In today’s digital landscape, data security is crucial, especially as we share sensitive information online. SSL (Secure Sockets Layer) certificates are foundational to that security,…
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SSL
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Analyzing I/O Performance in Linux

Linux
Analyzing I/O Performance in Linux Introduction Before diving into I/O performance analysis, first read our guide on analyzing CPU performance in Linux. This article builds…
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Verify SSL Certificate Using OpenSSL Tools

OpenSSL SSL
This guide provides instructions to verify and simulate SSL certificates using OpenSSL commands. 1. Check Individual Certificate Details: Command: openssl x509 -in my.crt -text -noout…
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Analyzing CPU Performance in Linux

Linux
Analyzing CPU Performance in Linux: A Comprehensive Guide Introduction Understanding and optimizing CPU performance is crucial for maintaining the efficiency of Linux systems. This guide…
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Comments Off on Set Operations in Linux

Set Operations in Linux

Linux
  Set Union The set union operation unions two sets, i.e., join them into one set. We write C = A ∪ B to denote…
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Optimizing Apache MPM Prefork for High Traffic Loads

Apache Webserver
Apache HTTP Server is renowned for its reliability and performance. However, the default configuration of Apache may not be optimized for handling high traffic volumes…
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Important windows commands

Uncategorized
Check the remote port status curl -v telnet://<IP>:<Port> Test-NetConnection <IP> -port <Port> Mapping port using SSH tunnel ssh -N  <user>@<remote_host>  -L 8080:localhost:80 This command will…
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Comments Off on Create separate web directory for each Linux user

Create separate web directory for each Linux user

Apache Webserver
In this article we will configure separate web directory for each Linux user. We will use Apache/2.2.15 (Unix)  web server and Red Hat Enterprise Linux Server.…
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Comments Off on Ansible Exam (RHCE 8) full solution with explanation

Ansible Exam (RHCE 8) full solution with explanation

Ansible Linux
  The RHCE 8 exam is totally based on Ansible. Generally, 15-17 questions are asked to solve in the exam. In this article, I will…
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Install Ansible on CentOS 8

Ansible Linux
Ansible is used to manage and administer multiple servers from a central computer. Installing Ansible on CentOS 8 is very straightforward. Enable epel-release first and…
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Recover MySQL 5.7 root Password in Redhat/CentOS 7

Database MySQL
You can recover MySQL 5.7 root Password with following 9  easy steps. These commands will work in Redhat/CentOS 7 Step-1: Stop MySQL server systemctl stop…
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SSH login without password in Linux

Linux
For many reasons we need to access remote server automatically without providing password. Specially when you need to copy file through script or programming from…
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How to write automated FTP script in Linux

FTP Linux
In this article I will show you how to write automated FTP script in Linux. File Transfer Protocol (FTP) is typically used to copy files…
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Installing Nginx with PHP support

Nginx PHP Webserver
This article will teach you “Installing Nginx with PHP support” in  CentOS 7/Redhat7  webserver. Nginx has grown in popularity since its release due to its…
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Comments Off on How to access HTML5 local storage

How to access HTML5 local storage

HTML5
HTML5 is becoming a common platform for both Web and Apps.  I personally started learning HTML5 when I decided to develop Apps for Android and…
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Comments Off on Embedding Google Map in webpage

Embedding Google Map in webpage

Google Map
Google Maps offers powerful, user-friendly mapping technology and local business information — including business locations, contact information, and driving directions.  Google Map offer free HTML…
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Creating Custom Google MAP

Google Map
Creating Custom Google MAP is an easy but powerful  way to represent  your location. You can  create  custom Google Map  and embedded it into your…
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fixing mysql replication error automatically

Database Linux MySQL
This article is written for those who have already read article “MySQL Replication skip error” . In that article I explained how to find out replication…
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Comments Off on Create database and user in phpMyAdmin

Create database and user in phpMyAdmin

Database MySQL phpMyAdmin
phpMyAdmin is a great tool to manage MySQL and MariaDB database.  Every cPanel allows  phpMyAdmin interface to manage the hosting database. It is often required…
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