Kubuntu 26.04 配置紀錄 (Kubuntu 26.04 Setup Notes)

本文將簡單記錄一些在 Kubuntu 26.04 上遇到的問題與解法。

1. 藍牙鍵盤無法配對 (Bluetooth Keyboard Cannot Pair)

若系統無法成功配對藍牙鍵盤，通常是因為藍牙控制器的模式設定不正確。

Reference: Ubuntu 20.04 cannot pair Bluetooth Keyboard

解決步驟 (Solution Steps)

首先，檢查 /etc/bluetooth/main.conf 中的 ControllerMode 設定：

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# Search for the ControllerMode configuration
grep "ControllerMode" /etc/bluetooth/main.conf

請根據搜尋結果進行以下調整：

1. 若值不是 dual：請將其修改為 dual。
2. 若值為 dual 但行首有 #：請刪除 # 以取消註解。

完成修改後，重啟藍牙服務或電腦，系統應能正常搜尋到鍵盤。

2. 鍵盤 Fn 鍵功能異常 (Keyboard Fn Key Not Working Correctly)

若 Fn 鍵預設觸發的是媒體鍵（音量、亮度等）而非功能鍵（F1-F12），可透過調整核心模組參數來修正。

臨時測試 (Temporary Testing)

執行以下指令即時更改模式並測試結果：

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# Set fnmode: 0 = disabled, 1 = media keys (default), 2 = function keys (F1-F12)
echo 2 | sudo tee /sys/module/hid_apple/parameters/fnmode

永久生效 (Make Changes Persistent)

確認測試成功後，建立設定檔以確保開機自動套用：

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# Create the configuration file for the hid_apple module
echo "options hid_apple fnmode=2" | sudo tee /etc/modprobe.d/hid_apple.conf

# Update initramfs to ensure the settings are applied during boot
sudo update-initramfs -u

Introduction

本篇文章紀錄一下在 Kubuntu 下安裝 Line 的過程。

Introduction

繼 UPS CP1000AVRLCDa 微開箱 之後，電池過了五、六年開開始無法蓄電，原本不太確定是 UPS 電路的問題或電池的問題，但想了一下以 UPS 相對簡單的模組（電路板 + 電池 + 螢幕），通常會壞掉的應該是電池而不是電路板，因此決定嘗試看看先換電池看續電是否正常（如果換完一樣是壞的就算了）。

Create a Flask+uWSGI+Nginx Docker Image

In this example, we will create a Docker image for a Flask application using uWSGI and Nginx. The image will be based on the tiangolo/uwsgi-nginx-flask image, which is a popular choice for deploying Flask applications in production.

Create a Private Docker Registry and Push/Pull Docker Images

In this guide, you will:

1. Install Docker on an Ubuntu server
2. Set up a private Docker registry on the Ubuntu server
3. Create a Docker image on Windows and push it to the private registry
4. Pull the image on the Ubuntu server and run it

Create a ASP.NET Core Docker Image

This is a simple demo for creating a Docker image for an ASP.NET Core application.

Before starting, ensure you have the following requirements:

1. Install Docker.

2. Install the .NET SDK.

3. Prepare an ASP.NET Core application. You can create a new ASP.NET Core Web API project using the following command:

   1	$ dotnet new web -n Demo

Introduction

This guide outlines the steps to set up an OpenVPN server on Ubuntu 24.04, including certificate management, server configuration, firewall setup, and client provisioning.

Introduction

After enabling the OpenVPN server on an ASUS router, the exported client.ovpn file may trigger the following error in the OpenVPN client on Android:

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OpenSSL: error:0A00018E:SSL routines:SSL_CTX_use_certificate:ca md too weak

This issue occurs because the CA certificate uses the SHA1 signature algorithm, which is outdated and considered insecure. Consequently, the OpenVPN client refuses to accept it.

There are two possible solutions:

1. Insecure (Not Recommended): Allow weak CA certificates.
2. Recommended: Renew the CA certificate using a stronger signature algorithm (e.g., SHA256 or higher).

Allowing weak certificates may expose your connection to man-in-the-middle (MITM) attacks or other vulnerabilities.

This guide walks you through the recommended solution.

Introduction

This guide shows you how to set up rsync on a Windows system by leveraging Git Bash from Git for Windows.
rsync is a powerful file synchronization tool commonly used on Linux, but it can also work on Windows with a few manual steps.
No need to install WSL or Cygwin - just follow this lightweight and portable method.

Introduction

This guide shows you through how to mount an external USB disk on an Ubuntu system and then access it from a Windows computer by mapping it as a network drive via SSH.
You don’t need to set up Samba or NFS — just SSH, which is often already available on Linux.