Resize swap

resize.sh

# Resize Swap to 8GB
# Turn swap off
# This moves stuff in swap to the main memory and might take several minutes
sudo swapoff -a
# if it won't work issue: 
# sudo /sbin/swapoff

# 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

# via https://askubuntu.com/a/1177939/637548