最近留連 Pandora ,「培養」了一個我稱為 Michael Crawford 的 Station (因為我逢見到 Michael Crawford (下稱 MC) 的我也會「舉手指」評分)。結果當然是累積了不少 Vocal harmony 類的歌手。除了 Michael Crawford 外,也經常「抽中」Michael Ball (下稱 MB) 的歌。兩個 Michael 兩種聲,其中最大的分
An unsurprising discovery about spammer behavior
Here's a recent, not entirely surprising discovery about spammerbehavior: some spammers are really slow to pick up DNS updates.
We changed MX entries to point to our new SMTP frontend on late Monday afternoon. Our MXentries had the standard 24 hour timeout and our secondary servers hadupdated to the new zones by Tuesday morning at the latest, so by nowit is more than two days after our old MX entries were required tohave been purged from caches, even if they were gotten from asecondary using
保留天星運動新聞稿:告全香港市民書
心淡
然後替友人提早慶祝生日,晚飯後回家。
今夜,被友人責罵,寧願看到我跌跌碰碰但總相信愛情,勝過如今甚麼都放棄還打算掛上價目牌,演活
Fedora Core's memory problem
; chkconfig --list autofs
service autofs supports chkconfig, but is not referenced in any runlevel (run 'chkconfig --add autofs')
; rpm -U autofs*.rpm
[...]
; chkconfig --list autofs
autofs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
Is it too much to ask that Fedora Core remember what services Iwant and don't want running over package upgrades? Apparentlyit is, because this happens
A SMTP implementor's conundrum
Today I ran across a good example of the sort of engineering conundrumthat bedevils people who implement things like SMTP clients:
In a multiline SMTP reply , which replycode should you use if different lines of the reply have differentcodes?
That is, in a regrettably non-hypothetical example, if you send aserver ' Should your client go on and send a If you walk up to the console of some Linux machines that have theircapslock turned on and try to log in, an interesting thing happens: (This works with Ubuntu 6.06, but not with Fedora Core 6.) Why does this happen? Once, long ago, there were terminals that only did upper case, and therewere people who wanted to connect them to Unix systems. So Bell Labs puta We put a new SMTP frontend machine in front of our core mail servertoday to handle incoming email from the outside world (for the usualreasons: dealing with spam better, shielding the core server fromsix zillion zombies all trying to talk to it at once, etc). Rather than wait for updated MX entries for all our domains to propagatearound and for people to switch to them, we figured we could speed upthe process by having our bridging firewall send connections for the coreserver's port 25 MAIL FROM:250-There's a problem.454 please try later
RCPT TO ,
An example of Unix's slow fossilization
keyx login: CKSPASSWORD:[...]CKS@KEYX:~$
誠徵 X'mas partner (revised version)
公司安排了我這顆寂寞芳心23-27號留在香港,那唯一可以做的,就是寫下這篇你正在看的blog。
總覺得傷心就像感冒一樣,吃藥過後,三兩天便會康復。當然,一星期後又可以被人惹病了。
然而,寂寞呢,就像咳嗽。
A limitation of OpenBSD bridging NAT firewalls
希望大家支持
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