This script is used to manage swap space on a Linux system. It first disables all swapping, deletes any existing swap file, creates a new swap file with a size of 12000 MB, sets appropriate permissions for security, formats the file as swap space, and finally activates the swap space.

create_swapfile.sh

#!/bin/bash
# Disable swapping for all swap devices and files.
sudo swapoff -a

# Remove the swap file.
sudo rm /swapfile

# Create a new swap file with size 12000 MB.
sudo dd if=/dev/zero of=/swapfile bs=1M count=12000

# Set file permissions to restrict access.
sudo chmod 600 /swapfile

# Set up the swap area on the file.
sudo mkswap /swapfile

# Activate all swap devices and files.
sudo swapon -a