You have just set up a new wireless network at your house, and you want to determine whether your Linux laptop has connected to it and obtained a valid IP address. What command will give you the information you need?

The command that will give you the information you need is "ifconfig". This command will display the network interface information, including the IP address assigned to your Linux laptop.

To determine whether your Linux laptop has connected to your wireless network and obtained a valid IP address, you can use the following command:

1. Open a terminal on your Linux laptop.
2. Type the command `ifconfig`.
3. Look for the wireless network interface. It is usually named "wlan" followed by a number, such as "wlan0" or "wlan1".
4. Under the wireless network interface, you should see an IP address assigned to it. If there is an IP address, it means your laptop has successfully connected to the wireless network and obtained a valid IP address.

Note: In newer versions of Linux, the `ifconfig` command has been replaced by `ip addr` or `ip a`. So, depending on your Linux distribution, you may need to use one of these alternative commands instead.