you have a swap partition, so use it:
sudo mkswap /dev/sda3
sudo swapon /dev/sda3
check if /dev/sda3 is listen in
cat /proc/swaps
cat /etc/fstab
you have a swap partition, so use it:
sudo mkswap /dev/sda3
sudo swapon /dev/sda3
check if /dev/sda3 is listen in
cat /proc/swaps
cat /etc/fstab