On 12/25/2014 11:54 AM, Garry T. Williams wrote:
On 12-25-14 11:20:01 Robert Moskowitz wrote:
information. Try it when there are a few APs around, then try and pick
out the couple of lines each per AP you want. I suppose I could pipe
the output into something that would look for like Channel, ESSID, and
Quality, but I am not good at writing regular expressions to put into
grep, say.
Aw, it's not that hard. You just want to pick out any line with one
of several words in it. Good old grep(1) will do it no problem. I
suppressed stderr from the iwlist(8) command so the error message
about interface lo doesn't show up. Also, the original grep(1)
command doesn't allow for alternation (|), so I use grep -E or egrep:
$ iwlist scan 2>/dev/null|egrep 'Channel|Quality|ESSID|Cell'
Why, thank you! I forgot all about egrep over grep. I will make
general note of this for future use.
Cell 01 - Address: 00:30:BD:93:E9:2C
Channel:4
Frequency:2.427 GHz (Channel 4)
Quality=53/70 Signal level=-57 dBm
ESSID:"vfr"
Cell 02 - Address: EC:1A:59:07:3D:46
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=32/70 Signal level=-78 dBm
ESSID:"belkin.d46"
$
It looks like substituting "Frequency" for "Channel" will eliminate a
line of output without losing what you say you want on each AP.
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