qsort_r 是個與 qsort 類似，但不包含在 ISO C 標準內的 function。因為非標準，不是每個 C standard library 都有實作，有實作的參數定義也不一定一致。最近發現 musl 加入了 qsort_r 的實作，就來彙整一下相關資訊。
Category Archives: Technical
用公開的 Jitsi 服務也可以上遠端音樂課？
前陣子看到 NiceCode 耐斯扣 NiceChord 好和弦釋出了自架 Jitsi 來上遠端音樂課的教學，勾起了我的好奇心：有沒有辦法，不修改設定檔；甚至，連自己架站都不用，就達成高音質、低延遲的目標呢？
割字機驅動筆記
修整雷射切割機的時候順便調校了一下割字機，來看一下它底層是怎麼從電腦驅動的。
雷射切割機改機筆記
最近修整了一台壞掉人家淘汰下來的雷射切割機，大致紀錄一下得到的資訊跟心得。
Installing Docker on Debian-based Distributions
Avoid both the use of obscure “convenience script” and the installation of out-of-tree kernel module.
Installing WireGuard on Raspberry Pi OS Buster
Jump to the last step! WireGuard is included in official suite of Raspberry Pi OS Buster since mid February, 2021.
Most of the instructions out there are far from something I would call “best practice”, so I wrote one my own.
Installing Linux Kernel From Debian Backports
Debian buster-backports started to serve kernel 5.6+ around mid June, 2020. By installing Linux kernel from the suite, we’ll have in-tree WireGuard kernel module and some more up-to-date drivers on Debian Buster, all officially signed.
Human-Readable DHCP Options for DNSMASQ
Cheatsheet to a more maintainable configuration.
Things About ClearFog Base/Pro
Must-Knows
- eMMC prevents the usage of booting from microSD. Stay away from eMMC variants unless there is a special reason.
- Generates a lot of heat, should always operate with a cooler and replace thermal pad with thermal paste.
Realtek 802.11ac USB Wi-Fi Linux Driver Installation
If you’re using your USB device in a virtual machine, see also Pitfalls Using USB Devices in Virtual Machines.
Target Devices
Adapters with chipset: RTL8811AU, RTL8812AU, RTL8814AU.
Note: Kali currently uses a separate driver for RTL8814AU.