Hosting Operations

Map Apache Virtual Hosts

You need to find Apache VirtualHost blocks and their names.

Command

grep -RInE '



    
      
        What changed
        Nothing changes. The command searches enabled Apache configs.
      
      
        Danger
        safe
      
      
        When to use it
        Use when a domain is served by the wrong Apache virtual host.
      
      
        When not to use it
        Do not assume ServerAlias coverage is complete without checking redirects and DNS too.
      
      
        Undo or recovery
        No undo needed because this command is read-only.
      
      
        Expected output
        VirtualHost, ServerName, and ServerAlias lines with file and line numbers.
      
    

    
      demo script
      Disposable terminal steps
      
        
          grep -RInE '

        
          grep -RInE '^[[:space:]]*DocumentRoot[[:space:]]' fixtures/apache/sites-enabled
        
      

      
        
          Terminal transcript
          Demo JSON
        
      
    


    
      
        simulated output
        What it looks like
        
          
            
            disposable vessel
          
          ::fixture-ready::
$ grep -RInE '
fixtures/apache/sites-enabled/app.conf:2:    ServerName app.example.com
fixtures/apache/sites-enabled/example.conf:1:
fixtures/apache/sites-enabled/example.conf:2:    ServerName legacy.example.com
fixtures/apache/sites-enabled/example.conf:3:    ServerAlias www.legacy.example.com
::exit-code::0
$ grep -RInE '^[[:space:]]*DocumentRoot[[:space:]]' fixtures/apache/sites-enabled
fixtures/apache/sites-enabled/app.conf:3:    DocumentRoot /srv/www/app/public
fixtures/apache/sites-enabled/example.conf:4:    DocumentRoot /srv/www/legacy/public
::exit-code::0

        
      
    

    
      
        YouTube Short
        Find Apache virtual hosts.
        When Apache serves the wrong site, map VirtualHost, ServerName, and ServerAlias before changing redirects.
      
      
        LinkedIn hook
        Apache chose a virtual host. You need to know which one.
        Question: When Apache serves the wrong site, what do you inspect first?
      
    

    
      experiments
      A/B tests to run
      
        
          Metric: comment_rate
          A: Apache chose a host.
          B: Map vhosts fast.