兩天沒寫,可能有些 Outdate
傳媒
Podcast
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兩天沒寫,可能有些 Outdate
傳媒
Podcast
網絡
早些陣子,買了大陸的科普讀物「 Newton 科學世界 」,該期的主題是「相對論誰也懂」,適逢是愛因斯坦發表相對論的一百週年,所以做了一個相當詳細的專輯,解釋狹義和廣義相對論。
我大學時不是修科學的,所以對於一些很出名
In a comment on my Legend of Debian post,Chris Wage wrote in part:
Most of the servers I run are: webservers, mailservers, CVS servers,etc. These are things for which well-established stable software hasexisted for years. I don't need bleeding-edge software to do them. Ineed stable representatives of that software that are supported bysecurity updates but don't otherwise change.
I have to disagree with this in the case of mail servers.
Unless you actively enjoy getting spammed
It looks like the hope from last week that spammers had stoppedforging University of Toronto subdomains as the origin of their spamwas in fact just a hope. 'Nonexistent local user' rejections are backup like clockwork. Oh well; it would have been nice.
IP level rejections:
Host/Mask Packets Bytes212.216.176.0/24 6663 339K213.4.149.11 6659
There's a story about vendor support people like to tell: if you payenough money, a lot of money, you'll get excellent support; but if youaren't willing to pay lots of money for support, clearly it's not really that important to you.
I don't know if paying lots of money gets you excellent support; I'venever worked for an organization that was in a position to pay thatsort of money. (I think you are unlikely to get
There is a story that salesmen like to tell you: if you buy everypiece of your system from them, you'll get excellent support becausethere's only one vendor involved. One set of people who knoweverything, one place to contact, and there'll never be finger-pointback and forth about whose fault something going wrong is.
This is a myth. Let's look at the reality.
Let's say that you want some front-end servers all talking to a big