SSH to AWS EC2 instance without key pairs

This is a common issue for the developers to access ec2 instances by username and password authentication.  It requires a few steps to do that. First, login as root using the key pairs. Second, create a user sudo adduser username Third, you need to grant root level permission to the new user visudo Add following … 

 

Upgrade PHP from 7.0 to 7.2

A long ago, I wrote about how to upgrade to 7.0. PHP 7.2 is released. Now, it’s the time again to upgrade to the new version.  The latest version of PHP comes with a couple of changes Convert numeric keys in object/array casts Counting of non-countable objects Object typehint HashContext as Object Argon2 in password … 

 

GIT Squashing and open source contribution

Never thought that GIT squashing would be that important for the open source contribution. I was contributing to an open source project. I finished the feature and created a pull request. Surprise!!! the community didn’t accept my pull request. Okay. … It was not rejected because of my wrong implementation or bad code. It was rejected just … 

 

Transfer tokens from orderbook.io to MyEtherWallet (MEW) wallet

It’s always suggested to transfer tokens to a new wallet that supports ERC20 tokens. MyEtherWallet (aka MEW) is an ERC20-compliant wallet and you can hold any ERC20 tokens there.   In this tutorial, I will cover how to transfer tokens from orderbook.io to MyEtherWallet.  I used Hacken Token (HKN) as example and wrote this tutorial … 

 

Automate static website deployment on AWS S3 using CircleCI

This is the very common practice now hosting a static site in AWS S3. Not only normal html-chess app, you can host angular, react or any kind of rich javascript app in S3. In my last tutorial, I explain how you can deploy your static website or contents into AWS S3.   Today, I will explain how you … 

 

Publish your static website with HTTPS, AWS S3 and Cloudflare

In this post, I will cover how easily you can publish your static website with HTTPS and Cloudflare caching (Despite its very limited in the free tier and Cloudflare is mostly used for security purposes). You don’t need to buy any extra server or SSL certificate. You can easily serve static HTML, CSS as well … 

 

Basic DevOps for deploying an application in Ubuntu VPS

As a senior dev guy in the office, I am always asked to help in setting up production environment ready for VPS based on Ubuntu or any other Linux distributions. Today I will cover some basic knowledge that help you deploying your application in any Linux VPS even you are not a DevOps Engineer in …