Tech

see also how to and hacks

Mac

  • Launchd (let's you automatically launch applications on startup, on disk mount, at certain times, etc)
  • Zsh alternative powerful shell

On Leopard you can issue a simple Terminal command to flush the DNS cache, and have your host file changes to take immediate effect:

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$ dscacheutil -flushcache

How to edit the hosts file in Mac OS X – Leopard « Decoding the Web

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