Curl -4 http://wttr.in/London | Hacker News Reader

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24 pointsharel10 comments

Where does worldweatheronline.com takes its data from?

EDIT: just found this http://reference.wolfram.com/language/note/WeatherDataSource...

/BuenosAires does not return the capital of Argentina, nor the largest province of Argentina, but a small town in Colombia (I got a huge scare when I saw those temperatures!).

Don't see any way around it.

Oh, fun fact:

    curl -4 wttr.in/

Returns data based on you geolocation.

The weather is WAY off though:

    Morning: 31 – 38 °C
    Noon: 34 – 41 °C

https://forecast.io/#/f/-34.5974,-58.3963

I don't think we've seen things like 41º in recent years, fortunately.

Apparently it's 28-29 degrees here. It really isn't.

(Weather Line is reporting 7, so the weather source for this is incredibly wrong)

Question: What does the -4 in the curl command do?

  man curl

  [cut irrelevant stuff]
  
  OPTIONS
  
  -4, --ipv4
  
  This option tells curl to resolve names to IPv4 addresses
  only, and not for example try IPv6.

I'm actually curious as to why this only works via ipv4.

you can do something like this to quickly search what some option is doing

$ curl --help | grep "\-4"

'-' needs to be escaped

Very good idea.

The -4 (ipv4) is not required.

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