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I was following this to try and set up a usable hotspot for my S3 and XBox 360 http://thenewbieblog.wordpress.com/2012/05/01/wifi-hotspot-setup-on-ubuntu/

Now when I go into Network>Wireless nothing shows up and the hotspot option no longer works there. Two things I'd like to do: 1) Restore my laptops ability to use wifi 2) Create a hotspot that the two devices can connect to at the same time

Not sure what other info should be provided so feel free to ask.

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Reset to default
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This should undo anything of any significance that you did following that blog post:

sudo apt-get purge hostapd dhcp3-server

echo "auto lo
iface lo inet loopback" | sudo tee /etc/network/interfaces

sudo perl -pi -e "s/^iptables.*//g" /etc/rc.local

Note that the second command is one command over two lines. Make sure you preserve the newline when you're pasting it in or you'll roger your /etc/network/interfaces file even more.

Anyway, run these and reboot.

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  • What does tee do in this case? And what has the universal constant to do with perls?
    – Henrik
    Sep 5, 2012 at 0:25
  • tee is taking the piped echo and writing it to /etc/network/interfaces. Using tee is just a smart way to do that with sudo (consider the alternative). The perl command is just there to run a sed-like search and replace and save it back to the file. It strips out lines that start with iptables (there are none by default).
    – Oli ♦
    Sep 5, 2012 at 0:33

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