UNIX to Automatically Join an Open Network

I am looking for a UNIX command or a preferences file that will let me change a preference to many computers.
What I want to change is in Network Preferences, Airport, click the Options button and next to
"If no recent networks are found:"
I want to change this from "Ask before joining an open network" to Automatically join an open network".
Thanks

Hi James,
   I don't use Airport so I can't give you explicit advice. However, info about is often posted here so let me take a shot to get things rolling. A nice utility that Apple provides to make changes to an Airport network interface is
/System/Library/PrivateFrameworks/Apple80211.framework/\
Versions/A/Resources/airport
According to the help printout of that utility, the preference file for it is:
/Library/Preferences/SystemConfiguration/\
com.apple.airport.preferences.plist
Note that I've broken both paths into two lines to that the rendering of this thread doesn't get messed up.
Gary
~~~~
   Once a word has been allowed to escape, it cannot
   be recalled.
      -- Quintus Horatius Flaccus (Horace)

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With both devices connected to the open linksys network, I will turn wi-Fi off on both devices, then turn it back on. The iPad will automatically rejoin the linksys open network every time, the iPhone does not automatically join. I always have to select it manually.
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Chuck Risher wrote:
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Look at iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
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http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
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iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

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UNIX to Automatically Join an Open Network

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