Syntax [cmd] <<[-] delimeter [cmd] contents delimeter All contents will be passed to the cmd as an input, examples below will use EOF as a delimeter and cat as a command, you can change to whatever you want. With Variable cat <<EOF echo "$HOME" EOF result: echo "/home/clavinjune" Escape Variable Use \$ instead of $…

Introduction Sometimes, when you need to modify a file that needs root permission, you forgot to use sudo before open it using vim. This is quite annoying when you have changed a lot of lines, but you can’t save the modification. Even though Vim has already warned us before editing using…

To use a random available port in Golang, you can use :0. I believe the port 0 would works for another language as well as I tried in python. $ python -m SimpleHTTPServer 0 Serving HTTP on 0.0.0.0 port 43481 ... According to lifewire, port 0 is a non-ephemeral port…

Introduction As embed package released on Golang v1.16, now you can include any of your files into your golang binary. You can also serve the embedded file as a static site. But when it comes to subdirectories, you need to handle it a bit differently. In this article, you will learn…

Introduction As a software engineer, you need to learn every day to keep your knowledge up-to-date. Any improvement in any aspect would help you write a better code. After writing more and more Golang code, I realized that I could improve this blog post. As you see in that post, you…

Introduction This is a cheat sheet for working with docker context to connect remote docker locally. Might help you to work with remote docker without manually SSH to the remote server. Add Context $ docker context create my-remote-docker-machine --docker "host=ssh://username@host" my-remote-docker-machine Successfully created context "my-remote-docker-machine" You can also utilize SSH Config file to…

Introduction Image is one necessary thing that you must plan when you want to containerize your apps. Building a large image means you need more data to transfer between your image repository, CI/CD platform, and deployment server. Creating a smaller container is a must to save time. There’s no need to…

TL;DR This solution works for Node v16.13.0 and NPM v8.1.3 Introduction I don’t always hate working using NPM unless it starts downloading tons of node_modules and giving not so verbose logs. Today, my colleague and I found an NPM login bug that’s not so interesting and hard to debug. …

Introduction Code Testing is a requirement for production codes. Some people ignore it, some people write it. Why do some people don’t write tests? One of the reasons is it takes time to think and write the test cases, and it may slow down the development and CI/CD process. When you…