前言
Let’s Encrypt 推出至今一年多，受到廣大用戶的歡迎，它的官方用戶端也隨著功能演變與更新也改名為 Certbot。
使用初期，為了加深對子網域個別的控制，因此採用憑證與子網域一對一對映的策略；但隨著子網域成員增加，每次逐一更新便顯得很沒效率。
本文將示範如何把多個子網域納入單一憑證，以及後續維護。
使用 Certbot 維護內含多個子網域的單一憑證
Ubench of Home Server 2017
New hardware for home server upgrade is finally arrived.
Intel Pentium G4560/FreeBSD 11.0-RELEASE-p9 (2017-04-26)
Lower frequency, but ~12% improvement in multi-thread, and 5% in single thread then my 2016 rigs.
Ubench:
Display build time in Visual Studio
Just got the new VM server ready, but I’m curious about how fast it is in my general use case. So I managed to find the settings to let Visual Studio show build time of projects.
閱讀全文 Display build time in Visual Studio
OS X 10.11.5+ 及 macOS Sierra SMB 效能低落的問題
背景
聽聞 macOS Sierra 之後的版本將以 SMB 3.0 作為建議的檔案分享方式，於是趁著放假把自家伺服器升級到 samba 4.4，簡單以 gigabit ethernet 測一下傳檔發現速度卡在 30 – 40 MB/sec。
診斷
AFP 傳檔很正常，大約 120 MB/sec；只有 SMB 傳檔效能低落，約 30 – 40 MB/sec
閱讀全文 OS X 10.11.5+ 及 macOS Sierra SMB 效能低落的問題
Ubench of Home Server 2016 (updated)
New hardware for home server upgrade is finally arrived.
Intel i3 4160/FreeBSD 11.0 (2016-11-20)
Wow! 2x improvement after upgraded to FreeBSD 11.0!
Ubench:
Intel i3 4160/FreeBSD 10.2 (2016-01-03)
Ubench: