Finding less used wireless channel on Linux

Want to find the less used wireless channel around you ? This little one liner will give a summary of all wireless channels with the number of SSID associated.

 echo "Nb SSID - Channel" ; iwlist scan 2>/dev/null | grep "Channel:" | cut -d':' -f2 | sort -n | uniq -c   
 Nb SSID - Channel  
       4 1  
       3 2  
       3 3  
       1 5  
       5 6  
       4 7  
       3 9  
       4 11  
       3 12  

Right column is the Channel number and left column is the number of SSID found on this channel.

 Of course, this is just a basic overview, for real deployments you should use a more sophisticated tool like inSSIDer.

Also an interesting post on how to choose the right channel :
http://www.dslreports.com/faq/14250