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How to force Network Manager in Ubuntu to rescan wireless connections?

After closing my laptop, network manager does not see new wireless connections. Is there any bash command to force rescan? sudo service network-manager restart does not help.

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up vote 13 down vote accepted
sudo iwlist interface scan

Where interface is the name of your wireless card, e. g. wlan0

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sudo /etc/init.d/networking restart should work...

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Simply deactivating and reactivating your wireless module would be a workaround.

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