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The sysadmin's life (again)

Wandering Thoughts | Jan. 31, 2008, 12:18 a.m. | Original

I made a bugfix to our mail server's configuration today.

Size of the bugfix: 25 characters added to an existing line.

Size of the comment sort of explaining why the bugfix is necessary: sixlines.

(And a complete discussion of the issue would be much longer.)

Of course, this is not unique to system administration; programmingalso has that sort of bugfixes. I think system administration may bemore prone to it, because so few of our tools, especially the ones with complicated logic

Linux's IP forwarding settings summarized

Wandering Thoughts | Jan. 30, 2008, 12:18 a.m. | Original

Unlike many Unixes, Linux determines whether or not it does IPforwarding on an interface by interface basis, based on interface thepacket arrived on . While Linux has a global IP forwarding sysctl, net.ipv4.ip_forward , pretty much all this really does is (re)set thevalue for all of the interfaces and make it the default; you can stillchange individual interfaces later.

The fine controls are in /proc/sys/net/ipv4/conf/ , where thingsgo like

自由的幻影

silencemo | Jan. 29, 2008, 10:45 p.m. | Original

有個朋友的口頭禪是：“好悶呀，我好想死！”朋友很年輕，戀愛有成，工作穩定，收入也相當不錯，但他每日都習慣“想死”幾十次，當然他至今仍然健在，但我從來沒有聽過他正確地說出眞正的渴求，他需要的，不是死，而

因接近死亡而潦草

tswtsw | Jan. 29, 2008, 2:57 p.m. | Original

正因為是一個很願意為作者付出的讀者，那個專欄的結集出版對我來說才是那麼難以承受的事。

前幾天在某處看到那些短文拼在一起，組成一個可以連接地讀下去的檔案界面，那些我已經為之傾倒過的文字，我一面滾動浮標，一

我好depressed

空姐的行李篋 | Jan. 29, 2008, 3:55 a.m. | Original

我好depressed，因為今晚要飛。

我好depressed，因為減肥尚未成功。

我好depressed，因為就o黎姨媽到。

我好depressed，因為我想轉工。

我好depressed，因為天水圍凍到仆街。

我好depressed，因為尋晚俾左家用。

我好depressed，因為媽媽搶左我新買既Kate Spade。

我好depressed，因為想買

廣告兩則

tswtsw | Jan. 29, 2008, 2:26 a.m. | Original

港台節目「4維賣藝」裡面有一個環節叫「耐人尋味」，有幾分鐘拍我，本週出街。主持是羅文樂，監製家豪非常有心，我的想法亂七八糟，最後剪出來不知怎樣。碌朋友咭都唔算，我在裡面說香港失去了冬天，結果今年大冷、

An annoyance in Python's attribute access rules

Wandering Thoughts | Jan. 29, 2008, 12:18 a.m. | Original

When looking up names on objects, I really wishthat Python had a special attribute accessor for looking upattributes it was about to call, instead of only running them throughthe regular attribute lookup chain.

While this uniformity probably has little effects on mostcode, it complicates the life of things such as proxy objects thattrace and monitor access to objects, which sometimes want to behavedifferently for ' var = you.foo ' than for ' var = you.foo() '. You canfake this by returning