how to increase swap in ubuntu code example

Example 1: ubuntu turn off swap

sudo swapoff -a && sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

Example 2: create swapfile ubuntu

sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576

Example 3: create swapfile ubuntu

/swapfile swap swap defaults 0 0

Example 4: create swapfile ubuntu

sudo fallocate -l 1G /swapfile