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• download Ubuntu server .iso file

• Connect a USB thumb drive to your pc

• Run command: 
  lsblk

• Identify your drive (usually /dev/sdX, X can be different for each system) 

  • NOTE: SATA HDDs & SSDs also identify as sdX so be careful not to corrupt your data.

• Run command:
  sudo dd if=${path/to/iso/file.iso} of=/dev/sdX status=progress

• Wait until dd finishes and safely eject the USB drive.

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