How can virtual memory be configured on Debian?

To configure virtual memory (also known as swap space) on a Debian system, you can follow these steps:

1. Check the current size and usage of the swap space.

sudo swapon --show

1. Create a file of a specific size, such as 1GB.

sudo fallocate -l 1G /swapfile

1. Set the permission of the file:

sudo chmod 600 /swapfile

1. Format the file as swap space.

sudo mkswap /swapfile

1. Enable file swapping

sudo swapon /swapfile

1. To permanently enable file exchange, you need to add the following line to the /etc/fstab file.

/swapfile none swap sw 0 0

1. Modify the size of the swapping space (if necessary):
2. You can adjust the size of swap space by modifying the swap line in the /etc/fstab file.
3. Alternatively, you can disable the swap space using the ‘swapoff’ command, then recreate and enable the swap space.
4. Finally, you can use the command swapon –show to confirm that the new swap space has been successfully set up.