Add Swap Centos 7

add_swap.sh

#!/bin/bash

sudo fallocate -l 2G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
sudo echo "/swapfile   swap    swap    sw  0   0" >> /etc/fstab

sudo sysctl vm.swappiness=10

sudo echo "vm.swappiness = 10" >> /etc/sysctl.conf