How to Create a Swap File on Ubuntu 24.04

To create a swap file on Ubuntu 24.04, follow these steps:

Step 1 : First, check the available memory using the command:

free -m

Step 2 : Next, check disk space using:

df -h

Step 3 : Allocate space for the swap file (e.g., 2GB) using:

sudo fallocate -l 2G /swapfile

Step 4 : Set proper permissions for the swap file:

sudo chmod 600 /swapfile

Step 5 : Make the allocated file a swap area:

sudo mkswap /swapfile

Step 6 : Enable the swap file:

sudo swapon /swapfile

Step 7 : Verify that the swap is enabled by running:

sudo swapon --show

Step 8 : To make the swap file permanent across reboots, add the following line to /etc/fstab:

/swapfile none swap sw 0 0

Congratulations! You have successfully created a swap file on Ubuntu 24.04.