Adjustable swap file creation and turn on script

AdjustableCreateSwapFile

#!/bin/bash
# round $1 to $2 decimal places
SWAP_FILE_SIZE_INPUT="${1:-8192}"
SWAP_FILE_LOCATION="${2:-/swapfile}"
round() {
    printf "%.${2:-0}f" "$1"
}
ROOT_STORAGE_STATS=`df -h | grep root`
FREE_SPACE=`df -h | grep root | awk '{print $4}'`
MEM_COUNT=$(round `grep MemTotal /proc/meminfo | awk '{print $2 / 1024}'` 0)

#Given a floating point value, we can round it trivially with printf:
echo $MEM_COUNT
#If more than 12 GB of free space and less than 4GB of ram create swap if swapfile does not exist
if ! [[ -f $SWAP_FILE_LOCATION ]]; then
	echo "SWAP File does not exist creating swapfile at $SWAP_FILE_LOCATION size $SWAP_FILE_SIZE_INPUT MB"
	touch $SWAP_FILE_LOCATION
	SWAP_FILE_SIZE=${SWAP_FILE_SIZE_INPUT:=8192}
	dd_cmd="sudo dd if=/dev/zero of=$SWAP_FILE_LOCATION bs=512 count=$(( $SWAP_FILE_SIZE * 2 ))K "
	$dd_cmd status=progress || $dd_cmd
	chmod 0600 $SWAP_FILE_LOCATION
	fallocate -l $(( $SWAP_FILE_SIZE * 1024 ))K $SWAP_FILE_LOCATION
	chmod 0600 $SWAP_FILE_LOCATION
	mkswap $SWAP_FILE_LOCATION
	chmod 0600 $SWAP_FILE_LOCATION
	swapon $SWAP_FILE_LOCATION
	cp /etc/fstab /etc/fstab.bak
	[[ -z `grep -o "$SWAP_FILE_LOCATION" /etc/fstab` ]] && echo "$SWAP_FILE_LOCATION none swap sw 0 0" | tee -a /etc/fstab
	sysctl -w vm.swappiness=25
 	[[ -z `grep -o "vm.swappiness" /etc/sysctl.conf` ]] && echo "vm.swappiness=25" | tee -a /etc/sysctl.conf
elif [[ -f $SWAP_FILE_LOCATION ]]; then
	echo "SWAP File currently exists at $SWAP_FILE_LOCATION!"
	echo "Only running swapon"
	swapon $SWAP_FILE_LOCATION
fi
chmod 0600 $SWAP_FILE_LOCATION
sysctl vm.swappiness

Run this

curl -s https://gist.githubusercontent.com/charlieporth1/cd255cf30fa7a414b59bddbce2ee8ae6/raw/4ebf79449c38c111e97ec7ec58f7842f829ac077/AdjustableCreateSwapFile | bash -s -- 8192 /swapfile