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====== Curl - Check HTTP Headers ======

<code bash>
curl -Ls -o /dev/null -D - sharewiz.net
</code>

  * -L  Follow redirects
  * -s  Silent mode. Don't show progress meter or error messages. 
  * -D  Write the protocol headers to the specified file.


returns:

<code bash>
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 01 Jul 2016 23:24:21 GMT
Content-Type: text/html
Content-Length: 28277
Last-Modified: Thu, 30 Jun 2016 23:16:03 GMT
Connection: keep-alive
ETag: "5775a833-6e75"
Accept-Ranges: bytes
</code>

----

===== Alternative method =====

<code bash>
curl --head http://www.sharewiz.net/
</code>

returns:

<code bash>
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 01 Jul 2016 23:47:49 GMT
Content-Type: text/html
Content-Length: 28277
Last-Modified: Thu, 30 Jun 2016 23:16:03 GMT
Connection: keep-alive
ETag: "5775a833-6e75"
Accept-Ranges: bytes
</code>

----

===== Check any specific resource =====

<code bash>
curl --head http://www.google.com/logo_plain.jpg
</code>

----

===== Dump document headers to a file =====

<code bash>
curl --dump-header headers.txt http://www.google.com/
</code>