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zimbra

Daily monitoring for a sysadmin

Among other mundane checks:

  • Check Zone-H.org to see if your site have been defaced.

  • Check Sender Base to see if your server have been blacklisted for whatever reason you missed.

I've to stress that the above is the additional checks you should do. Because you should be able to detect patterns of abuse even before you get listed in any of the above.

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angch's picture

Han's User Interface Metrics

angch — Wed, 30/07/2008 - 12:47

Random thoughts on UI design. On going. Will update as I go along.

  • Responsiveness. Give feedback in less than 100ms. More than 100ms, do it asynchronously, but don't block!

  • Minimize number of clicks to common tasks/actions. Huffman code the frequency. Dang it, adaptive markov chain. Apply statistical compression to UI actions.

  • Discoverablity. Expose actions based on context. No hidden actions.


Ajax app fail if responsiveness less than non-ajax app. Javascript and ajax meant to make things seem faster for the user, not consume my CPU and block my Firefox.

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Zimbra Install on Ubuntu Dapper

angch — Mon, 28/07/2008 - 20:08

Han's checklist for Zimbra 5.0 (ZCS) on Ubuntu Dapper from scratch.

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