Shell script to help manage swap space - cp to /usr/bin and chmod +x

swap

#!/bin/sh

CMD=$1
SIZE=$2

create()
{
	if [ -z $SIZE ]; then
		swapsize=1024
	else
		swapsize=$SIZE
	fi
	
	sudo /bin/dd if=/dev/zero of=/var/swap bs=1M count=$swapsize
	sudo /sbin/mkswap /var/swap.1
	sudo /sbin/swapon /var/swap.1
	
	echo "DONE!"
}

remove()
{
	status
	
	retval=$?
	
	if [ $retval -eq 0 ]; then
		sudo /sbin/swapoff /var/swap.1
	fi
}

status()
{
	swapon -s | grep -q "/var/swap.1"
	
	swaptest=$?
	
	if [ $CMD = "status" ]; then
		if [ $swaptest -eq 0 ]; then
			echo "SWAP EXISTS"
		else
			echo "SWAP NOT FOUND"
		fi
	else
		if [ $swaptest -eq 0 ]; then
			return 0
		else
			return 1
		fi
	fi
}

case "$1" in

	create)
		create
	;;
	
	remove)
		remove
	;;
	
	status)
		status
	;;
	
	*)
		N=~/swap
		echo "Usage: $N (create|remove|status) [size]";
	;;

esac

exit 0