Create

You can use free -h to check the current swap usage

Create a new swap file (set the size as needed)

sudo fallocate -l 1G /swapfile

Set file permissions to root only (optional)

sudo chmod 600 /swapfile

Format the file as swap space

sudo mkswap /swapfile

Enable swap

sudo swapon /swapfile

Enable automatic mounting

Open the etc/fstab file and add at the end:

/swapfile none swap sw 0 0

Modify

Change swap activation threshold

Open etc/sysctl.conf and modify the value after vm.swappiness=80 .If it does not exist, add a new line.

Change swap size

• Use swapoff -a to turn off swap
• Delete the previously created swapfile
• Repeat the creation steps