Deactivating wireless network interfaces should prevent normal usage of the wireless capability. <br xmlns="http://www.w3.org/1999/xhtml"/> <br xmlns="http://www.w3.org/1999/xhtml"/> First, identify the interfaces available with the command: <pre xmlns="http://www.w3.org/1999/xhtml"># ifconfig -a</pre> Additionally,the following command may also be used to determine whether wireless support ('extensions') is included for a particular interface, though this may not always be a clear indicator: <pre xmlns="http://www.w3.org/1999/xhtml"># iwconfig</pre> After identifying any wireless interfaces (which may have names like <xhtml:code>wlan0</xhtml:code> , <xhtml:code>ath0</xhtml:code> , <xhtml:code>wifi0</xhtml:code> , <xhtml:code>em1</xhtml:code> or <xhtml:code>eth0</xhtml:code> ), deactivate the interface with the command: <pre xmlns="http://www.w3.org/1999/xhtml"> # ifdown <i>interface</i></pre>These changes will only last until the next reboot. To disable the interface for future boots, remove the appropriate interface file from <xhtml:code>/proc/net/wireless</xhtml:code>

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