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When CentOS boots up, it tries to determine the IP for a network device (eth0) and fails.

'Determining IP information for eth0... failed; no link present.'

I'm curious to know how, after booting up, I could set the IP information for a wireless device, wlan0, manually.

Another way of putting this questions is: if CentOS is able to determine IP information for a network device on bootup, what settings is it configuring exactly?

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migrated from stackoverflow.com Sep 21 '10 at 21:30

This question came from our site for professional and enthusiast programmers.

It's trying to get an IP address (and gateway, etc.) from the DHCP server to get your computer into the network.

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Check out the CentOS Team's well documented Wireless How-To guide. What your OS is currently doing is using dhclient to probe your devices and search for a DHCP server to obtain a lease.

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