GPG key transition: 7BD22F74 → D28DA8DC
I should have transitioned my old GPG key to a stronger one for long time, it’s finally done today, with the help of here and here. You can find my signed letter at...
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Nexus One 手機螢幕自己換小筆記
好幾個月前在過馬路的時候不小心把 Nexus One 掉到地上，螢幕立即多了一道裂痕。雖然手機已處於半退役狀態，而且螢幕裂得不嚴重，但看着不爽，索性上淘寶買個螢幕把壞的換掉，也當是練練拆機，況且換不好也無所謂。 其實拆 Nexus One 不是第一次，由於 Nexus One...
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思源/Noto pan-CJK 字體 & Ubuntu
以開源協議授權釋出的字體大多數以拉丁字母等歐洲語言爲主，但最近 Adobe 和 Google 共同推出的思源/Noto pan-CJK 開源字體不只涵蓋了大部份中日韓所需要的字型，而且繁中、簡中、日文和韓文都用了不同的 OTF 檔案，因此對同一個漢字在不同地區的不同寫法就能個別處理，算是解決了 Unicode 一直爲人詬病的 Han unification 問題。 香港人最關心的應該是該字體是否覆蓋...
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Hack a fan –自製空氣淨化器
上週日在北京 Bookworm 書店+咖啡廳參加了一個很有趣的 DIY 土炮空氣淨化器活動。北京經常被陰霾籠罩， AQI (空氣質素指數) 大部份時間處於不健康水平，在北京生活，口罩和空氣淨化器必不可少。其實空氣淨化器的構造不複雜，簡單說就是由風機抽取室內空氣，通過濾網把空氣中的顆粒隔除 。濾網包括 HEPA，活性炭等。很多市面上賣的淨化器都用 HEPA，HEPA...
View ArticleHow to include local packages for pbuilder
The ibus-cangjie suite consists of 3 source packages: libcangjie, pycangjie and ibus-cangjie, pycangjie depends on libcangjie and ibus-cangjie depends on the other two. When you use pbuilder or its...
View ArticleCompile kernel module on Linode Debian VPS
Connection to linode hosts from within China can be poor from time to time. Choosing a suitable TCP congestion algorithm may alleviate that from insignificant to a great deal, your mileage may vary....
View ArticleOsaka, Kyoto and Nara Travel Tips
After more than 10 years I traveled to Japan again. This time I went with my wife to Kyoto, Nara and Osaka. Here are some tips about travelling to these areas I want to share and also serve as notes to...
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解決 WordPress 中 Google Web Font 被 GFW 屏蔽問題
自從本 blog 的 wordpress 升級並更換 theme 後，偶爾發現 page load 得很慢，用 chrome 自帶的 developer tool 查了一下才發現原來 theme 用了 google web font，因爲 google service 被牆了所以在大陸瀏覽就像卡住了一樣。由於我絕大部份時間都是科學上網，所以一開始沒有發現問題。 既然 google web font...
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Deploy Shadowsocks on Raspberry Pi with ChinaDNS and Redsocks
Assume you already have a Raspberry Pi configured as a WIFI router like mine shown below, but you live in China and have to deal with the fact that many websites can’t be accessed due to GFW. Don’t be...
View ArticleBoost WIFI Speed by Forcing 40 MHz Channels in hostapd on RPi
802.11n can double the channel bandwidth of 802.11g from 20 MHz to 40 MHz, but this operation mode is not recommended in areas that the spectrums are congested and likely interfere with existing WIFI...
View ArticleObfuscated SSH tunnel
VPN providers were cracked down, open source anti-censorship tools were eliminated. This is what’s happening in China and has become even more severe than ever. Shadowsocks alone is no longer reliable...
View ArticleDebian 哀悼 Ian Murdock 離世
bits.debian.org 上發佈了 Ian Murdock 的死訊，由於對 Ian 十分敬佩，看到之後立馬把它翻譯過來，本來已經在上月31號翻好並發到 debian-publicity 郵件列表，可是不知什麼原因那邊一直沒收到（已經用了兩個不同的 email）。由於剛好那段時間在日本旅遊，也就沒太注意。今天打算再看看什麼問題的時候，發現 Anthony Fok 已經把另一篇由...
View ArticleSecuring DNS Traffic in China
Overview DNS poisoning is one of the most common cause of nuisance when accessing websites that are outside this 1.4 billion-people Oriental country. So far, the best way to protect yourself from this...
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How to Read Kobo e-books on Your Kindle Devices
Recently I am fortunate to be introduced of a wonderful book about self improvement. As a Kindle user, the first thing I do is to look for it in the Kindle Store. Bummer, the search result returns...
View ArticleDebian 10 “buster” 來了
Debian 已正式釋出 Debian 10 “buster”，可喜可賀，小弟將 release notes 的重點總結了一下。 • Gnome 預設的 display server 改為 Wayland，對不想使用 Wayland 的用家仍可選用 Xorg。 • 91% 的 source package 已能 reproducible build。Reproducible build...
View ArticleGmail, Exim and Let’s Encrypt
上個月 24 號發現不能在 Gmail 選擇用自己的 domain name 的 email 發電郵，發完後 Gmail 會回信報錯： The response was: TLS Negotiation failed, the certificate doesn't match the host. 本以爲 SMTP server 哪裏設定不對，在網上發現不少人跟我一樣有同樣的經歷，原來最近...
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