Techinfobest – A place for all tech articles

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…

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…

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…

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,…

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…

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…

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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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…

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…

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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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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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…

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…

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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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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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…

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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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…

Install WordPress in Bangla

WordPress

Install WordPress in Bangla WordPress displays in U.S. English (en_US) by default. But the software has the built-in capability to be used in any language..…

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Install WordPress in other language

WordPress

Install WordPress in other language WordPress displays in U.S. English (en_US) by default. But the software has the built-in capability to be used in any…