Create Swap Ubuntu 16.08

swap.sh

# How To Add Swap Space on Ubuntu 18.04
#
# Check out https://stackmate.io and find out how this (and much more) can be done automatically for you

# Before you run this script, please check that swap is not enabled with the following command:
# sudo swapon --show
# If it shows some output, then you probably don't need to run this script anymore

# We're allocating 8GB of swap
sudo fallocate -l 8G /swapfile
# count = blocksize (bs=1024) * 1024 * 8 (8gb)
sudo dd if=/dev/zero of=/swapfile bs=1024 count=8388608
# set the right permissions and enable
sudo chmod 600 /swapfile
sudo mkswap /swapfile
# keep a backup copy of your fstab file
sudo cp /etc/fstab /etc/fstab.bak
# enable swap on boot time
echo '/swapfile swap swap defaults 0 0' | sudo tee -a /etc/fstab