High-performance mass web crawling on AWS
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 ...
Managing servers with OpenSSH Certificate Authority
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 m...
How to change email of your Nvidia account
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 ...
Make your GitHub Pages website faster with Cloudflare
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.
Converting DFA to Regular Expression
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 comme...
Raspberry Pi 4 B Review and Benchmark - What’s improved over Pi 3 B+
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.
My speech at Microsoft Summer Camp 2019
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.
Creating templated Systemd services
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.
Using SSH deploy keys on CircleCI
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 ...
How I saved a lost commit from GitHub
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 ...
Wolfram Mathematica 13 Key Generator Online
As iBug no longer uses Mathematica himself, this keygen will not be updated or maintained anymore.
Build a minimal Linux system and run it in QEMU
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.
Filter manually installed packages from APT with AWK
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.
Bootstrapping Make
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.
Setting up Ubuntu in VMware Workstation
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.
Access your Raspberry Pi remotely with SSH
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.