I need to do some testing using curl against our web farm. Each server has some default page with some verbiage on it like this:

"Welcome to webappsrv01"
"Welcome to webappsrv02"   and so forth.

How can I use curl and grep(?) to grab the "Welcome to webappsrv(?)" string so I can see it the output on the screen as I hit the webfarm? I need to know what server I am hitting.


2 Answers 2



curl -s https://example.com | grep -o "This doma.."


This domain


  • -s in curl is silent mode - it will not print progress

  • -o in grep is only matching - only matching string will be printed

  • This doma is pattern and two dots .. means any character can be there so in your case it will be two digit numbers


Not quite sure what you are asking, but as far as i can see you can use something like this

$ curl <url> | grep -Po 'Welcome to webappsrv\d+'

-P - PCRE regex, we use this for our \d which matches digit

-o - only matching word, not whole line

+ in regex - match 1 or more times digit

  • Why did i get downote? Feb 21, 2019 at 18:33
  • Tryna - This is good. I am indeed trying to catch the following two letters/digits after the host name (webappsrv01/02) etc. I made a mistake though. Some of the older servers in our lab have text like this: "webapp 1" or "webapp 2". IS it possible to skip a space and the grab then grab the number? Can you show me that please? I did Upvote but I don't have enough reptuation credits for it show up.
    – jogle900
    Feb 21, 2019 at 18:57
  • Tryna - The second example didn't work for me. I got the following error: -bash: syntax error near unexpected token `(' These examples are still very useful and appreciated.
    – jogle900
    Feb 21, 2019 at 19:10
  • Matej - Your example worked great as well and it simpler for this specific task. I did UPvote as well. Thank you,
    – jogle900
    Feb 21, 2019 at 19:10
  • @jogle900 $ curl https://example.com | grep -Po '(Welcome to websrvapp01\d+)|(webapp\s\d+)' will match "Welcome to websrvapp01" aswell as "webapp 1" and also "webapp 02" Feb 21, 2019 at 20:06

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