Bash script to create 4GB swap memory

create_swap.sh

#!/bin/bash

# Set swap file size (4GB)
SWAPFILE="/swapfile"
SIZE="4G"

echo "Creating a $SIZE swap file at $SWAPFILE..."

# Create the swap file
sudo fallocate -l $SIZE $SWAPFILE || sudo dd if=/dev/zero of=$SWAPFILE bs=1G count=4

# Set the correct permissions
sudo chmod 600 $SWAPFILE

# Set up the swap area
sudo mkswap $SWAPFILE

# Enable the swap
sudo swapon $SWAPFILE

# Make the swap permanent
if ! grep -q "$SWAPFILE" /etc/fstab; then
    echo "$SWAPFILE none swap sw 0 0" | sudo tee -a /etc/fstab
fi

echo "Swap file created and activated successfully."