inSSIDer is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The best Linux alternative is Kismet, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to inSSIDer and seven of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to inSSIDer are netsniff-ng, LinSSID, Wifi Network Testing and wavemon.
Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic.
netsniff-ng is a free, performant Linux networking toolkit. The gain of performance is reached by zero-copy mechanisms, so that on packet reception and transmission the kernel does not need to copy packets from kernel space to user space and vice versa.
LinSSID is graphically and functionally similar to iwscanner (Linux) and Inssider (Microsoft™ Windows®). It is written entirely in C++ using Linux wireless tools and Qt4.
Scan your wifi network and obtain troubleshooting details, with extreme granularity.
wavemon is a wireless device monitoring application that allows you to watch signal and noise levels, packet statistics, device configuration and network parameters of your wireless network hardware. It should work (though with varying features) with all devices supported by the...
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Used it, provides great and easy to use interface, shows channels and graphs quite good