====== Raspberry useful commands ======

  # Set a password for root user:
  sudo passwd root

  # Allow root login
  sudo nano /etc/ssh/sshd_config
  # Authentication:  PermitRootLogin: yes
  # restart ssh service
  sudo service ssh restart

  # Secure off
  sudo shutdown -h now
  
  # Memory
  free -m
  
  # Disks
  lsblk -f
  
  # Version OS
  /cat/etc/osrelease
  
  # Temperature
  vcgencmd measure_temp