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