How to Create a Swap File on Ubuntu 23.10

To create a swap file on Ubuntu 23.10, follow these steps:

Step 1 : Start by creating a swap file. Check your system's memory usage with:

free -m

and disk space with:

df -h

Step 2 : Allocate space for the swap file (replace 2G with the desired size):

sudo fallocate -l 2G /swapfile

Step 3 : Set proper permissions for security:

sudo chmod 600 /swapfile

Step 4 : Format the file as swap:

sudo mkswap /swapfile

Step 5 : Activate the swap file:

sudo swapon /swapfile

Step 6 : Confirm that the swap is active:

sudo swapon --show

Step 7 : Make the changes permanent by adding the swap file to the /etc/fstab file. Open the file with a text editor:

sudo nano /etc/fstab

and add the following line at the end:

/swapfile none swap sw 0 0

Save and exit the text editor.

Congratulations! You have successfully created a swap file on your Ubuntu 23.10 system.