Every system administrator has little twitches, behaviors that strikeoutside observers as somewhere between odd and superstitious. Sometimesthese are just habits, but sometimes they have interesting storiesbehind them.
One of my twitches is that when I use su , I always type ' /bin/su '(or on some irritating systems, ' /usr/bin/su '), not plain ' su '.(By now it's a reflex.)
This habit originated in a bit of security advice. The story goes
So that I don't have to try to remember it or look it up next timearound, here is how to generate a real self-signed SSL certificate withOpenSSL. The basic but incomplete incantation is:
openssl req -x509 -nodes -days-keyout .key -out .crt ... If you want a merged PEM certificate, just make the
-keyoutand-outarguments the same thing. The key (or the PEM
無限廣告在險峰
我和可洛都會去， 當然也要請各位到場撐場，讀讀自己的詩 。否則我們一直讀下去就太悶了。（ps.這不是發佈會）。
幻聽不曾移動瓶子樹 廿九几讀詩會
日期：2005年11月27日
時間：15:00-16:30地點：kubrick書
20051124網摘 – SSE 使 RSS 互動起來
IT News
- Standardizing the Microsoft Office Open XML formats 不要混淆了，MS 只是將其 Office XML 給 ISO 認証，並非說 Office format 要成為 Standard
- MPAA and BitTorrent to join forces in frozen hell BT 的 Bram Cohen 與 MPAA 搞乜鬼？有人估計是要將 BT 成為合法的發佈渠道，且看記招自有分曉
- Hollywood, BitTorrent Reach Agreement 原來只是防止 bittorrent.com 搜到侵權電
Solaris 9's slow patch installs
Yesterday was my first time installing the Solaris 9 recommended patchset on a production machine; we rolled it onto a basically unpatchedserver. Because it was a server, I did it in single user mode (thepatch set recommends this, as some patches in the patch set sayexplicitly to apply them in single-user mode).
I already knew that installing the patch set was achingly slow on mytest machine, but my test machine is an Ultra 10 so I wasn'tsurprised. The machine from
Multiprocessors are a leaky abstraction
Earlier this week, the story started rumbling through the usual places that using hyperthreading on Intel CPUs could cause seriousperformance problems in some applications, like Microsoft SQL Server.The current best guess of the cause is cache thrashing due toHyperthreaded processors sharing L1 and L2 cache. If a process thathammers the cache is scheduled onto one logical processor of a HTpair, it will destroy the performance of anything running on theother logical CPU (I'm summarizing from here ).
As this vividly demonstrates, multiprocessors
觸Show 2
十條 觸Show 有長短節目：音樂、行為藝術、繪畫、舞蹈、即興
演出單位：謝偉祺、鄺頌安+丸仔、周雲蓬(北京)、
廖東梅+鄭政恆、卓新力量、微風吹、觸映份子日期：2005年 12月10日 (星期六)
時間：
寫文壞習慣
寫 Blog 寫得多，多少對自己的寫文陋習有些了解。
其一是多餘字眼，我寫東西重看一遍後，除了要更正錯字別字，最常見是要刪去無用的「其實」、「基本上」、「實際上」、「事實上」、「當然」等等。這些字最常出現在我的文
A quick outline of Firefox extension structure
Yesterday I mentioned Firefox extensions inpassing. Let's fill in the blanks.
Firefox extensions come as
.xpifiles, which are just yet anotherextension for ZIP archives. Unpacked, extensions live in their owndirectory in theextensions/subdirectory in your Firefox profiledirectory. Firefox profile directories live under~/.mozilla/firefox; the default profile is in.default .(Firefox randomizes the name of the profile directory, I believe dueto security concerns.) The actual name of an extension
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