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Use iwconfig to check your interfaces.
Use man for info on tools you're trying to use.

man iwconfig
Read everything.

Try everything before looking for help.... It'll turn out to be better...

Yeah... I was quick to judge that in this case something was off with the #
I'm unable to recreate the error. Looks like the fact that it was edited did the trick.

For kali 2 users:

The error comes up as a result of the missing space after the hashtag in /etc/apt/sources.list



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