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sudo apt-get update
sudo apt-get install nginx

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http {
  upstream backend {
    server server1.example.com;
    server server2.example.com;
    server server3.example.com;
  }
  
  server {
    listen 80;
    server_name example.com;
    
    location / {
      proxy_pass http://backend;
    }
  }
}

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upstream backend {
  server server1.example.com;
  server server2.example.com;
  server server3.example.com;
}

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upstream backend {
  server server1.example.com weight=3;
  server server2.example.com weight=2;
  server server3.example.com;
}

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upstream backend {
  ip_hash;
  server server1.example.com;
  server server2.example.com;
  server server3.example.com;
}

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upstream backend {
  server server1.example.com;
  server server2.example.com backup;
  server server3.example.com;
}

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sudo nginx -s reload

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