Category Archives: OS

Linux 第一次完全佔領超級電腦 Top 500 列表

在 Top 500 公佈新的資料後,就有人發現 Linux 第一次完全佔領了超級電腦 Top 500 列表裡的作業系統:「Linux Now Powers 100% of the World’s Top 500 Supercomputers」。 另外在「China Pulls Ahead of U.S. in Latest TOP500 List」也列出了這次的前五名,可以看出來中國在這塊砸了不少錢:

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Savitech (盛微) 的 USB 音效驅動程式會安裝 Root CA (被發了 CVE-2017-9758)

在 Hacker News 上看到 CERT 的「Savitech USB audio drivers install a new root CA certificate」提到 Savitech USB audio driver 會安裝自己的 Root CA: Savitech provides USB audio drivers for a number of specialized audio products. Some versions of the Savitech driver … Continue reading

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兩個 process 互相 kill 的可能性

Twitter 上看到的奇怪實驗 XD 在 Mac OS X 與 Ubuntu 上都有機會發生: a student asked if two processes can kill each other by sending simultaneous signals; this program does that about 10% of the time on my Mac pic.twitter.com/neTQN4wj8B — John Regehr … Continue reading

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用 4.5+ 的 Linux Kernel 限制 I/O 速度

在「Using cgroups to limit I/O」這邊看到作者試著用 cgroups 限制 I/O 速度。 作者前面花了不少篇幅解釋 cgroups v1 無法正確限制 I/O 速度,後面就在講 cgroups v2 怎麼做: So, in order to limit I/O when this I/O may hit the writeback kernel cache, we need to use both memory and … Continue reading

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Windows 將引入 TruePlay,推出作弊偵測的 API

在「Windows now includes gaming cheat detection at the system level」這邊看到微軟將會引入 TruePlay (然後跟 Sonos 的 trueplay 衝名 XDDD) 作弊偵測機制。 很明顯的會有隱私問題,而也很明顯的微軟說不會有隱私問題: As Microsoft notes, "to protect customer privacy, no data is shared or transmitted until permission is granted," and no information is … Continue reading

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Android 將測試 DNS over TLS

從「Android getting "DNS over TLS" to prevent ISPs from knowing what websites you visit」這邊看到的報導,原 文在「Android getting “DNS over TLS” support to stop ISPs from knowing what websites you visit」這邊可以看到。 It appears that “DNS over TLS” support is being added to … Continue reading

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在 Mac 上快速換輸入法的方法:Kawa

三月的時候在「在 Mac 上快速切換輸入法」這邊提到了 IMEShortcuts,但有時候還是不會生效... 在「GitHub 中那些不错的免费软件」這篇裡面提到了 open source 的 utatti/kawa 這個專案,裡面有針對 CJKV 輸入法的 bug 提供 workaround,就給個機會測試看看: There is a known bug in the TIS library of macOS that switching keyboard layouts doesn't work well when done programmatically, especially between complex … Continue reading

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Amazon Lightsail 支援 Windows 了

Amazon Lightsail 決定支援 Windows 了,算是其他目前幾家領頭的 VPS 還沒進入的領域:「Amazon Lightsail Update – Launch and Manage Windows Virtual Private Servers」。 由於多了 Windows 的授權費用,價錢貴了不少: 不過還是提供一個月免費的額度: You can try out a 512 MB server for one month (up to 750 hours) at no charge. 不過不是所有 … Continue reading

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Linux 下 RAID1 的 SSD 會有讀取不平均問題

在「Unbalanced reads from SSDs in software RAID mirrors in Linux」這邊看到作者看 S.M.A.R.T. 數據時發現兩顆 SSD 硬碟組成的 RAID1 有很明顯的讀取不平均的問題: 242 Total_LBAs_Read [...] 16838224623 242 Total_LBAs_Read [...] 1698394290 原因是因為 Linux 對 RAID1 的 SSD 有不一樣的演算法: The current state of RAID1 read balancing is kind … Continue reading

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iOS 11 的無線網路與藍芽關假的讓 EFF 不爽...

這次 iOS 11 的無線網路與藍芽需要到 Settings (設定) 裡面才能有效關掉的設計,讓 EFF 不爽寫了一篇文章:「iOS 11’s Misleading “Off-ish” Setting for Bluetooth and Wi-Fi is Bad for User Security」。 On an iPhone, users might instinctively swipe up to open Control Center and toggle Wi-Fi and Bluetooth off … Continue reading

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