This is the best page I could find to help with this, I don't see what I want to do on there: http://wiki.bash-hackers.org/syntax/pe. But I think I've seen this done before.

Say I want to run the same query against Bing and Google (let's assume these would work):

curl -S "https://www.google.com?q=stackoverflow"

curl -S "https://www.bing.com?q=stackoverflow"

Could I run them both in one curl? Like curl -S "https://www.${'bing','google'}.com?q=stackoverflow"

I'd swear I've seen this done before. But I clearly have the syntax wrong. As well as the search terms.


Curl understand (and expand) braces:

curl -S 'https://www.{bing,google}.com?q=stackoverflow;'

From man curl:

You can specify multiple URLs … by writing part sets within braces as in:


This is different to shell brace expansions, Curl will not expand Nested braces like the following shell code example will:

$ echo {{1..3},{5..7}}
1 2 3 5 6 7
  • Was it the $ that as goofing me up? – jcollum Dec 19 '16 at 20:53
  • curl -S "https://www.{bing,google}.com?q=stackoverflow;" is simpler and works, is it wrong? – jcollum Dec 19 '16 at 20:54
  • You said it must be unquoted but you quoted it. Confusing. – jcollum Dec 19 '16 at 20:56
  • curl -S "https://www.{bing,google}.com?q=stackoverflow;" does expand... I get 2 curls when I run that. – jcollum Dec 19 '16 at 20:58
  • @jcollum Answer re-written. Yes, the $ seem to be the biggest problem you had. – sorontar Dec 19 '16 at 21:28

handled by shell as two url parameters:

curl -S https://www.{bing,google}.com\?q=stackoverflow

handled by internal curl syntax in single url param:

curl -S https://www.\{bing,google\}.com\?q=stackoverflow

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