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How to Access SOM9331 Serial Console in Linux

I got this old hackable mini router board. It comes with OpenWRT but I can’t seem to connect this via USB Serial. It turns out that the driver is not installed. Installation is quick but there is a minor change needed in order to build the driver on a recent kernel. So will write here…

May 31, 2022
How to Enable HTTPS on Your Apache Ubuntu Web Server

I thought this is an easy task, but after searching for various ways on the internet, it is not as simple as I imagined. There are many ways to enable HTPPS on your web server depending on what server software is used, the operating system, and where the server is running. In my case, I…

March 19, 2022
Now I Understand: What is Oblivious RAM?

ORAM is the acronym of an Oblivious Random-Access Machine. The main idea is to hide the access patterns from attackers. For example, when a client tries to access data stored in the server, the server cannot gain any information about the user access pattern. Imagine data storage, where each data is inside a block, and…

March 18, 2022
Easy Fix when Pop-OS Login Screen Shown on The Wrong Monitor

I turned on my newly installed Pop OS and then suddenly the login screen is located on the left monitor. It’s horrible! Because I put my left monitor into a vertical position, and the Pop OS login screen orientation is in horizontal mode. Therefore I had to tilt my head -90 degrees to type my…

March 16, 2022
How to Run Linux on RISCV in Arty A7-100T FPGA

It’s been tempting for me to try running open-source software on top of open-source hardware. SiFive provides a bitstream for Arty A7 called Freedom, but it seems that the repository is dead now. The other interesting alternative to try is VexRiscv, and everyone keeps posting about Arty A7 35T while I only have the 100T…

March 15, 2022
How to Cut and Download Youtube Videos using Command Line

In some of my free time, I am actively using Instagram, not to show off or seeing people’s life that I don’t even care about. For me, this social media is perfect for everyday reminders for positive feeds. Usually, people choose a youtube video at the best moment, then re-post it on Instagram as a…

October 15, 2021
Git Pristine: How to Pristine Clean Your Dirty Git Repository

I found this command useful and I love this alias! git pristine, a command that will wipe any dirt on your local git copy, any untracked files, and the cache will be removed to make it pristine clean as the remote origin.

September 27, 2021
Now I Understand: What is Independent and Identically Distributed (IID) Random Variable

I was working with my friend on a Random Number Generator (RNG) research paper. We need to evaluate the quality of our random bitstream result using the NIST SP800-90B entropy test.

August 10, 2021
Simple Way To Change Pop Os Default Login Monitor

I use three monitors, one of which is in a vertical position. Sometimes the login screen on Pop OS appears on the main monitor, sometimes it appears on a vertical monitor, but in a horizontal position. Like it or not, I have to log in with my head tilted. Although if you look at the…

August 9, 2021
QEMU: How to Enable Plugin Build

By default, QEMU does not enable the plugins. So you need to enable it on configure step by using –enable-plugins.

June 28, 2021

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