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In the excerpted .bashrc in post 4, there is an unfortunate omission.

You will either need to change the grepx reference to grep,
or add the missing alias for grepx which is:

alias...

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I ran across a very useful linux command with which to query NetworkManager
via command line to assess the situation in one's wifi neighborhood. This
command is nmcli. With only a few parameters...

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If you would like to know what the wifi environment looks like where you are,
here's a little command-line way to display who's on which channel and how strong
they are relative to your own...