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