title: Send request to CMake server from the Linux command line
body: <p>I would like to play around with the CMake server mode from the Linux command line. The documentation tells me to start CMake like the following:</p>
  
  <pre><code>cmake -E server (--debug|--pipe &lt;NAMED_PIPE&gt;)
  </code></pre>
  
  <p>But for me it works only this way:</p>
  
  <pre><code>cmake -E server --experimental --debug
  
  [== "CMake Server" ==[
  {"supportedProtocolVersions":[{"isExperimental":true,"major":1,"minor":0}],"type":"hello"}
  ]== "CMake Server" ==]
  </code></pre>
  
  <p>I tried to send a request to the server, but I get only the hello response:</p>
  
  <pre><code>cat request.txt | cmake -E server --experimental --debug
  [== "CMake Server" ==[
  {"supportedProtocolVersions":[{"isExperimental":true,"major":1,"minor":0}],"type":"hello"}
  ]== "CMake Server" ==]
  </code></pre>
  
  <p>How can I send requests to the CMake server?</p>