Observer's Space

Quick Installation Matlab 2025b on Arch

Mon, 10 Nov 2025 01:00:34 +0100

Since I’m on Wayland, the best way to install Matlab should be mpm.
The Wiki page worked for me and the steps I executed include:

yay matlab-mpm
mpm install --release=R2025b --destination=~/matlab MATLAB 
#ofc, you can change the destination

Normally, you should be able to just execute ~/matlab/bin/glnxa64/MathWorksProductAuthorizer.sh and finish activating your license. However it didn’t went that smooth for me, because recent gnutls update (likely 3.8.10-1 or newer) breaks the TLS handshake in MATLAB’s bundled licensing libraries (libmwinstall\_activationwsclientimpl.so and libmwlmgrimpl.so), causing the segfault when the tool tries to connect to MathWorks servers.
So I ran these to make Matlab use the old version of gnutls :

Fix Copy SMS Code on Graphene

Sat, 27 Sep 2025 14:30:58 +0200

You can read the detail description in this issue.

The fix is, find out the listener service with this adb command:

adb shell pm dump io.github.jd1378.otphelper | grep -i "notification\|listener"

And you can see it’s called io.github.jd1378.otphelper/.NotificationListener.

So, we grant it special access to read notifications (which is not possible via settings GUI, and I don’ know why):

adb shell cmd notification allow_listener io.github.jd1378.otphelper/.NotificationListener

How to Make Microsoft Bluetooth Mouse 3600 Work in Linux Windows Dual Boot

Thu, 28 Aug 2025 19:06:24 +0200

Before moving in the Netherlands, I used a USB mouse, and as a result I never bothered for pairing issues on dual booting Linux/Windows. However, I found Microsoft Bluetooth Mouse 3600 specifically helpful as it functions smoothly even without a mousepad.

Certainly, you can read this detailed tutorial from Arch Wiki, so I won’t explain too much on the general process.

The problem is, the table for Bluetooth 5.1 devices does not cover the model Microsoft Bluetooth Mouse 3600, and I have to refer to “Other devices”, the guidance of which does not really work for me.

Adding Priter Support for Epson L3150 on Arch Linux

Thu, 07 Aug 2025 20:01:58 +0800

My printer is on network at address 192.168.138.250 .

First add CUPS:

sudo pacman -Sy cups cups-browsed bluez-cups cups-pdf
sudo systemctl enable cups 
sudo systemctl start cups

Then some other dependencies (and drivers, if you want to use some other type than Epson L3150):

sudo pacman -Sy system-config-printer
sudo pacman -Sy nss-mdns
sudo pacman -Sy foomatic-db foomatic-db-ppds 
sudo pacman -S foomatic-db-nonfree foomatic-db-nonfree-ppds

And we should install the driver for L3150, which can be achieved with an AUR package (Epson only offer .deb and .rpm packages officially):

Mastodon Comment Test

Wed, 06 Aug 2025 14:45:33 +0800

Does it work?

Privacy Policy

Wed, 06 Aug 2025 10:31:52 +0800

At Observer’s Space, we don’t intend to track you with analytic tools or cookies. Nevertheless, we do have some features that you might dislike:

We are sponsored by NodeGet, and they use Cloudflare as their analytic tool. You may refer to their Privacy Policy. Consider using Tor or uBlock Origin to prevent fingerprinting if you do not like analytic tools.
The website does not function fully if you disable JavaScript, that is to say, Giscus or Fediverse comments will not be loading. You can always use the alternative mailing list instead.
In order to minimize the repository size, we use Bunny Fonts and ZSFT to deliver web fonts. These two providers do not store any unnecessary data or share them with third party.

We do not store your IP address, your browser type or operating system. ~~Our web server provider Codeberg only keeps one week log of your IP address.~~ We have moved to FramaSoft’s GitLab Pages due to the current status of Codeberg Pages. You should refer to FramaSoft’s CGU, specifically:

Interpreting Internet.nl Test Results

Tue, 05 Aug 2025 17:00:59 +0800

Disclaimer: I have been a user of almost every email provider mentioned below, and I am not affiliated with any of them.

You can read Forward Email’s comparison with many providers here: https://forwardemail.net/en/blog/forward-email-vs-mailbox-org-email-service-comparison , by substituting mailbox.org with others on their list.

In short, Forward Email has some wrong information. They attempt to achieve full score in every security test and prove they are superior to their competitors with scores. I don’t know what is driving Forward Email towards being a pupil, and it seems like many privacy seekers get trapped into how high they score in the Internet.nl tests.

Arch Setup

Mon, 04 Aug 2025 15:45:50 +0800

Just performed a fresh install of Arch, and try to use zsh instead of bash.

To make it remember history, and inherit nice aliases from bash , make a file .zshrc with the following:

# Created by newuser for 5.9
export PATH=$PATH:/home/user/.local/bin
# uncomment the line below if you feel like using oh-my-posh 
# eval "$(oh-my-posh init zsh --config 'catppuccin')" 
alias ls='ls --color=auto'
alias grep='grep --color=auto'
PS1='[\u@\h \W]\$ '
export XDG_DATA_DIRS="/var/lib/flatpak/exports/share:/home/user/.local/share/flatpak/exports/share:/home/user/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share/:/usr/share/"
HISTFILE=~/.zsh_history
# How many commands to store in history
HISTSIZE=10000
SAVEHIST=10000
setopt SHARE_HISTORY
# uncomment the lines below if you installed Fcitx 
# export XMODIFIERS="@im=fcitx"
# export GTK_IM_MODULE=fcitx
# export QT_IM_MODULE=fcitx

By default, GNOME doesn’t recognize tray icons from applications. This would be a headache for applications that starts up silently and automatically minimizes to tray. Head to Flatpak manager and install Extension Manager, open it and search for AppIndicator and KStatusNotifierItem Support, install the extension and you’ll be able to see icons showing up.

Using GnuPG to Verify Yourself on Keyoxide

Sat, 26 Jul 2025 20:57:44 +0800

Disclaimer: this post is a machine translation of the original Chinese version. Please refer to the original content for accurate information.

Preface

Keyoxide is similar to Keybase.io, used for verifying the identity consistency of online accounts.

For example, search for contact@forgejo.org on Keyoxide.org, and you’ll see that Forgejo owns a Mastodon instance account @forgejo@floss.social, the domain forgejo.org, and a Forgejo instance account @forgejo@codeberg.org.

You can also search using OpenPGP public key fingerprints. For instance, search for my fingerprint (which can be found on the “Contact” page) on Keyoxide.org, and you’ll see that Yuki claims ownership of accounts such as ActivityPub, Matrix, Forgejo, as well as the domain obsp.de.

In Seek of Private Email Solution

Mon, 21 Jul 2025 22:36:45 +0800

Earlier this month I wrote an article with the title Encryption in Email Practice. My point of view is pretty straightforward, “encryption not complete means no encryption at all”, and people should stop relying on email for any secret or privacy. Nevertheless, people would not just stop because I (and many others) said don’t, as the inertia of communication is hard to revert.

The most interesting article I have read as an email enthusiast should be E-mail providers - which one to choose?, as the author themself appears to be a super paranoid and the ultimate seeker of privacy. The inspection method they have used is not technical, as they basically went through the privacy policy page of each provider and tried to sign up through Tor. Their criteria is at least extreme and trivial, if not hilarious:

Contact

Sun, 20 Jul 2025 13:49:56 +0800

Keyoxide

Email I will reply in 12 hours :)

Import my OpenPGP public key with the following command: curl -s https://obsp.de/key.txt | gpg --import . Please check the fingerprint and make sure it matches 9967 35BE 4961 80AF B582 ECAB EE31 BB28 ECF6 B268 .

Matrix if you prefer instant messages over email.

Fediverse, where I mumble. This Sharkey instance’s admin is awesome!

Friends

Sun, 20 Jul 2025 13:49:56 +0800

Mailer: https://mailer.su

MinuteSphinx: https://blog.minutesphinx.link

Rebel Zhang: https://rebel1725.codeberg.page/

Welcome

Sun, 20 Jul 2025 13:49:56 +0800

欢迎来到 Observer’s Space！Welcome to Observer’s Space! Observer’s Space へようこそ！ Willkommen bei Observer’s Space! Welkom bij Observer’s Space! Bienvenue sur Observer’s Space!

Blog for FOSS projects and how to self-host them, brought to you by Kamiki Yuki.

We (I, actually) provide you with instances of services, which are indexed below:

https://info.obsp.de

All the services are open to registration, please do not abuse.

Use Your Custom Domain or Not for Email

Mon, 14 Jul 2025 08:57:15 +0800

The short answer is yes, the long answer is not always.

The benefits of using your own custom domain, and the drawbacks of not using it, are listed below:

Email providers would shut down, and all you have to do is changing MX records.
You don’t always need to pay for extra addresses. A simple catch-all would solve the problem, and you can reduce spam by setting up rules with each recipient address.
More solutions available. Some email hosting providers are exclusive for custom domain users, and you can engage with different providers with your inbound and outbound, get the best solution of each. For example, I self host my inbound email with mail-in-a-box and have full control over the spam filter, but I’m concerned with IP reputation and deliverablity, so for the SMTP service I simply choose Amazon SES at a low price.

The points above sound pretty valid, but people have raised some concerns:

Encryption in Email Practice

Wed, 09 Jul 2025 22:06:00 +0800

Modern demands on email privacy are exceeding its original design and are still growing even more enormous. This is morbid.

Let’s take a look at some certain use case: Alice created a banking/finance account (something similar to Revolut/Paypal), and her login credential are listed below:

username: alice@example.org
password: You1-Should9-Use0-A7-Password4-Manager2!

Alice was careless, she didn’t follow the best practice of backup and lost her KeePass database (or her Vaultwarden database, or she forgot master password, or the paper that she wrote passwords on). Unfortunately, this is the only copy of the above username/password combination, there’s no way to retrieve.