add swap space ubuntu code example

Example 1: create swapfile ubuntu

sudo swapon --show

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

Example 5: create swapfile ubuntu

sudo swapon /swapfile

Example 6: create swapfile ubuntu

sudo nano /etc/fstab