No puedo resolver el problema ya que soy un novato en Linux:
ubuntu@ubuntu:~/Desktop$ tar -xvzf tpm-emulator-master.X.Y.tar.gz
tar (child): tpm-emulator-master.X.Y.tar.gz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
ubuntu@ubuntu:~/Desktop$ ls
tpm-emulator-master ubiquity.desktop
gracias por tu ayuda