Last month I set up my own Telegram bot for GitHub event notification. To receive GitHub events via webhook, a receiver is needed. True, it isn’t hard to write a Flask or Sinatra server and throw the whole thing onto a VPS, but thinking about the complexity and maintenance efforts, serverless pla...
Today when I was running some networking diagnostics from an Ubuntu inside VMware Workstation, I noticed this strange result from mtr (My Traceroute):
Since years ago, containers have been a hot topic everywhere. There are many container softwares like Docker, Linux Containers and Singularity. It’s hard to say one understand what containers are without diving into all the gory details of them, so I decided to go on this exploration myself.
It’s 2021 now, and Adobe Flash Player has been end-of-life after December 31, 2020. There are many cases where you want to retain it, however. For example, you may want to keep enjoying an old game that’s been around for decades, or managing your organization’s infrastructure via VMware vSphere F...
Why use an external service when there’s an in-house GitHub service?
I’ll go straight to the solution (keep in mind that it’s considerably primitive, so use at your own risk) with code attached below. It’s a Tampermonkey userscript.
There’s a less-known feature of Jekyll that populates related_posts correctly with “related” posts, instead of the 10 latest posts when it’s disabled by default.
OpenSSH 8.2 is coming to the latest Long-Term Service release of Ubuntu, Focal Fossa (20.04), and has some breaking changes for users using an SSH Certificate Authority.
For all of us who are learning to use or developing with MySQL or MariaDB, it’s a common task to manually log in to the database for inspection. This is usually done with the mysql command line client, and for sure it’s cumbersome to log in to the database using your application’s credentials. Fo...
The 3rd-and-last experiment of course Web Information Processing and Application required us to create a recommendation engine, and “predict” the rating (1-5 stars) for 4M user-item pairs based on the training data of 9M user-item pairs and a social network.
Since the addition of the website server for an external corporation, I now have 5 Linux servers to manage on my own. I also have 4 terminal devices that I use to connect to those servers: two of my laptops, my Android phone (using Termux), and one of those servers that I use as a workstation.
I recently retired a few old email addresses, and am currently going in a row to change email for accounts associated with those emails. Everything else went smoothly, with my Nvidia account being an exception - There wasn’t an option to change it!
This September I employed Cloudflare to optimize my website (https://ibugone.com) in various aspects. It turned out to be a brilliant move and Cloudflare has proved to be a great service to have.
This post originated from Lab 1 of course Compilers: Principles that I’m currently taking, in which we were required to write a flex program to parse a subset of the C language. The multiline comment /* */ was the most troublesome to handle for most of us (excluding me, for sure).
Lately I’ve finally received my Raspberry Pi 4 (4 GB model), and I couldn’t resist the temptation to give it a try and see all the improvements that’s been reported for months.
This is a translated version from the Chinese (original) script. The slideshow can be acquired here. For comments, please head to the Chinese version of this post.
Last time I wrote an article about NAT traversal using FRP, which has been my personal solution for exposing SSH access of machines behind NAT to the internet for a long time.
A year ago back I wrote an article on automating build & deployment of GitHub Pages website with Travis CI. It’s a great CI service at first, but since Travis CI has completely moved away from containers, speed is a real issue to whoever is concerned. On the other side, CircleCI is continuing...
Earlier today I force-pushed to my repository USTC-RV-Chisel for testing purposes, without noticing that my local ref origin/master is 1 commit behind the actual master on GitHub. My friend pushed his work (1 commit) to it, and now it’s lost.
Supports Wolfram Mathematica 12.x
Linux is the #1 open-source operating system nowadays, and many people are running a Linux distro, such as Ubuntu or Arch. Linux is also the most popular choice for a server OS.
It’s again when I want to find out what packages I have manually installed (or by a script) from the output of apt list, with all output on one line.
Have C or C++ project to build? You may think, “Yeah this is very easy, I’ll just call the compiler to do so”, and yes, let’s take a look at an example.
A quick step-by-step guide for those wanting to get in touch with Ubuntu in a virtual machine with minimal effort. For example, at the start of a semester of Operating System Concepts course.
Do you have a personal server at home but can’t access it from work or travel because your home doesn’t have a public IP? If so, then, this article is what you’re looking for.
This semester I have the course “Experiments of Digital Circuits”, the content of which is designing digital circuits using Vivado software, and writing Verilog code. Most of the lab papers require generating bitstream for the project and downloading it to Nexys4 DDR board to verify the functiona...
The TL:DR line: If you want my script, you can get it here.
I just bought an Xbox One S controller yesterday, expecting it would pair with my Android phone via Bluetooth. I have learned that the key mapping would be a bit messed up because it’s a Microsoft product, and have already prepared for it by downloading a key layout file and placing it in my phon...
How to create a Minimal, Complete, and Verifiable example
As described in a previous article, Alpha-Beta pruning can be used to speed up minimax heuristic searching by pruning branches that will never be reached.
As a casual attempt to accomplish a Grand Assignment, I created a Reversi game with Python. The project is open-source on GitHub and you can view it with the link above.
Update December 2020
After a plain request, an administrator of the SmokeDetector project added me under the Developers section of their team member list, which indicates that I am a known personnel for contributing a non-trivial amount of code to the project.
For people new to template resolution and template type deduction in C++, they may have written this code and get confused why it doesn’t compile:
Laptops have usually at most four cores, and dualcores are probably more common. I have recently switched from quadcore to dualcore and I can confirm there is a limited number of use cases for quadcore, even with CPU intensive tasks.
Original post: RegEx match open tags except XHTML self-contained tags by bobince on Stack Overflow