1G permament swapfile

add1gswap.sh

#!/usr/bin/env bash
#
# Always find my self creating 1G swapfile for tiny EC2 machines (I know I should rely only on RAM, but the free ssd is there
# and it had saved my life in the past), and not getting better at recalling each step.
# 
# Oneliner:
# sudo fallocate -l 1G /swapfile ; sudo chmod 600 /swapfile ; sudo mkswap /swapfile ; sudo swapon /swapfile ; echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab ; swapon --show
if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi
fallocate -l 1G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
swapon --show