This moves stuff in swap to the main memory and might take several minutes
Turn swap off
sudo swapoff -a
Create an empty swapfile
Note that “1G” is basically just the unit and count is an integer.
Together, they define the size. In this case 8GB.
sudo dd if=/dev/zero of=/swapfile bs=1G count=8
Set the correct permissions
sudo chmod 0600 /swapfile
sudo mkswap /swapfile # Set up a Linux swap area
sudo swapon /swapfile # Turn the swap on
Check if it worked
grep Swap /proc/meminfo
Make it permanent (persist on restarts)
Add this line to the end of your /etc/fstab:
/swapfile swap swap sw 0 0