create-swapfile.sh

# Create and attach swapfile

sudo fallocate -l 8G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile

# Permanent mount 

echo "/swapfile   none    swap    sw    0   0" | sudo tee -a /etc/fstab

# Tweaks

sudo sysctl vm.swappiness=10
sudo sysctl vm.vfs_cache_pressure=50

echo "vm.swappiness=10" | sudo tee -a /etc/sysctl.conf
echo "vm.vfs_cache_pressure=50" | sudo tee -a /etc/sysctl.conf