Problem This error were reported when updating and starting Ghost. The error message is similar to this: Ghost was able to start, but errored during boot with: alter table `members_link_click_events` add constraint `members_link_click_events_member_id_foreign` foreign key (`member_id`) references `members` (`id`) on
SSH
First, create a key pair. This will eventually create a private key and a public key under ~/.ssh directory on your machine. $ ssh-keygen -t ed25519 It will ask the location to which it store the key files. You can specify your preferred location if needed. Enter file in which to
Problem Maintaining a ghost blog on its own VM requires diligent system updates and maintenance. Today, when I updated ghost using ghost-cli, it threw a message that I need to update compatible node version. My node was v14 and the new ghost update requires the version 18. While there are
In this posting, I will show how to install ZSH and Oh-My-Zsh on Windows PC (WSL). This will be helpful if you want to setup a Linux development environment on Windows PC. I have already installed Ubuntu 20.04 on Windows Subsystem for Linux (WSL). Bash is the default shell
Last Fall, I could have a great opportunity to take a master course of Computing for Scientists at Chapman University. Professor Dressel was an awesome teacher, who was knowledgeable about different programming languages although he teaches as a physic professor. The course requires various small projects with bash, Python, Julia,
Lessons about programming languages, JavaScript, Pythond, web development, tools and tips
In this posting, I will show how to install ZSH and Oh-My-Zsh on Windows PC (WSL). This will be helpful if you want to setup a Linux development environment on Windows PC. I have already installed Ubuntu 20.04 on Windows Subsystem for Linux (WSL). Bash is the default shell
In this video, I will show how to customize the bash prompt of Windows Subsystem for Linux and how to add the bash program to Windows Terminal. I assume that you have already installed Windows Subsystem for Linux on your PC. I will use Ubuntu 20.04 version for this
In this post, I will explain how to customize the Linux bash prompt on Windows and add it to Windows Terminal. There are several ways to use Linux on a Windows computer. The most popular methods are Git Bash and Windows Subsystem for Linux (a.k.a. WSL). I will
This is a short summary of how to deploy a MEAN app (MongoDB, Express, Angular, and Node.js) on Nginx and run the app with PM2.
Install Node/NPM on a production server
curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.9/install.sh | bash`
This will add
Git is a great tool to manage development code bases. git push upload local codes into a remote repository, which can be purposed for a backup or code sharing. Another useful case of git is to deploy an application. Traditionally, we have used a FTP application to upload codes onto
Do you need some music downloads to listen before travel? I find a great program, youtube-dl, online. It is a command-line program to download videos from YouTube and many other video sites. For details, visit its official github. There are various ways to install youtube-dl. You can visit its download
Last Fall, I could have a great opportunity to take a master course of Computing for Scientists at Chapman University. Professor Dressel was an awesome teacher, who was knowledgeable about different programming languages although he teaches as a physic professor. The course requires various small projects with bash, Python, Julia,
This is one of presentation slides that I prepared for 2017 SCIUG conference presentation. I used Plotly library to visualize library business data. Data come through Sierra SQL API. Plotly has Python offline plotting APIs, which are very useful to chart data in the back-end. Slide
Docker provides two ways of data persistence: 1) named volume and 2) bind mount. Named volume is a recommended way because Docker manages the volume and the volume can be reused in different services and in multiple containers. Bind mount is basically mounting a path of a host machine. The
This is my summary of twelve factors for building a web app, software as as service. (https://12factor.net/), which is published by Heroku co-founder Adam Wiggins. 1. Codebase: use a version control, which maintains a single codebase per an web app. One codebase can have multiple deployments. 2. Dependencies:
I had an opportunity to present at the 2016 SCIUG conference. I introduced our summer project of creating a study room reservation system. Particularly, my highlight was the integration of LibCal with Sierra using REST APIs.
A good presentation for JavaScript learners. The speaker, Angus Croll, pointed out in the speaking that there were some blind sides in JavaScript community. Although it was in 2013, the message is still valid today and in the future, non only in the domains of JavaScript and Programming Language but
