How to Create a Swap File on Ubuntu 23.04

To create a swap file on Ubuntu 23.04, follow these steps:

Step 1 : Begin the process by checking disk space and available memory using df -h and free -m commands.

df -h
free -m

Step 2 : Allocate a 2GB swap file using the command:

sudo fallocate -l 2G /swapfile

Step 3 : Set appropriate permissions for the swap file:

sudo chmod 600 /swapfile

Step 4 : Mark the file as swap space:

sudo mkswap /swapfile

Step 5 : Activate the swap file:

sudo swapon /swapfile

Step 6 : Confirm that the swap file is active:

sudo swapon --show

Step 7 : Update the /etc/fstab file to automatically mount the swap file on boot by adding the line:

/swapfile none swap sw 0 0

Congratulations! You have successfully created a swap file on your Ubuntu 23.04 system.