Blogs

Did you know that you can change the message you see when you do ssh connect? /etc/motd The contents of the /etc/motd file are output by...

Related terms and commands What do the symbols on the Linux command line mean？ I’m going to explain each of the symbols' meanings....

Hello! I’m going to talk about the spread syntax that can be used to expand arrays, etc. that are added to ES2015. What’s spread syntax？...

I decided to play around with ChatGPT. So, I asked ChatGPT to make the Python turtle race I made last time more exciting. The environment...

I’m going to make turtles compete with each other by using the Python library turtle. You can do a lot of things with turtles like the...

Introduction First of all, the “public” of the public function is called an access modifier, access modifiers allow properties (variables...

When you have many EC2 instances, you may forget to stop instances that you are not using. If you keep running the instances that aren't...

In this article, I’m going to introduce you to the differences between Wasabi (Hot cloud storage) and Amazon S3 (AWS’s object storage)....

What is Wireshark？ It is one of the most famous necessary tools for network engineers. It supports Windows and macOS, and basically...

What is tfenv? The tfenv is a tool that’s for managing Terraform versions with CLI. You may have noticed the similarity in the name. The...

Many of you may use “ll” instead of the “ls” command. In this article, I’m going to explain what “ll” is and what you should know about...

I’m going to introduce Linux commands and options that are smartly used. For example, $ ps auxwwf | grep httpd | grep -v "grep” This one...

What are constructors? A constructor is a method that is always executed when a class is instantiated (made into an object). An usual...

Have you experienced the MySQL slow.log file that has been accumulating for some time? Don’t you worry, you can use log rotation in this...

When you want to install an old version of MySQL, but there’s no repository on the official site, you can do these steps to install it....

You might already know about “mysqlpump”, but I used this tool as an experiment and I made some suggestions for people who haven’t used...

The “history” command is being used for displaying a list of commands that have been run. The history command Display a list of commands...

Have you guys heard about “AWS Ground Station''? It is explained like this on their official website. AWS Ground Station is a fully...

This article is a continuation from our last blog post. Let's create a VPC from the template file we created last time. Create a stack...

In this article, I’m going to talk about how to write a template file that’s necessary to execute CloudFormation. What is CloudFormation？...