makeswap

#!/bin/bash
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi
FILE="/var/swap-$$.img"
read -p "Size in MB: " SWAPSIZE
echo "Creating file $FILE"
touch $FILE
echo "Allocate $SWAPSIZE MB space for swap on $FILE"
dd if=/dev/zero of=$FILE bs=1024k count=$SWAPSIZE
echo "Make swap space on $FILE"
mkswap $FILE
echo "Use $FILE for swap"
swapon $FILE
echo "Add swap to /etc/fstab"
echo "$FILE none swap sw 0 0" >> /etc/fstab