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Magento 2: Print Invoice PDF or Shipment PDF is not working : sh: 1: xvfb-run: not found

Some times in Magento 2, while we try to print Invoice PDF or Shipment PDF or any other PDF, then it displays following message: sh: 1: xvfb-run: not found
To resolve this issue, first login to your project through SSH and run following commands on the root location of your project:
  • sudo apt-get install --fix-missing -y xvfb
  • sudo apt-get update
  • sudo apt-get install xvfb libfontconfig wkhtmltopdf  
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