The curl using guide

u:~# curl -vL baidu.com

curl -v baidu.com
* Rebuilt URL to: baidu.com/
* Trying 110.242.68.66...
* TCP_NODELAY set
* Connected to baidu.com (110.242.68.66) port 80 (#0)
> GET / HTTP/1.1
> Host: baidu.com
> User-Agent:curl/7.58.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Wed, 03 Aug 2022 07:42:03 GMT
< Server:Apache
< Last-Modified: Tue, 12 Jan 2010 13:48:00 GMT
< ETag: "51-47cf7e6ee8400"
< Accept-Ranges: bytes
< Content-Length: 81
< Cache-Control: max-age=86400
< Expires: Thu, 04 Aug 2022 07:42:03 GMT
< Connection: Keep-Alive
< Content-Type: text/html
< 

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