Make a swapfile on Linux of 1GB

mk1Gswapfile.sh

#!/bin/bash
## blame: [email protected]
## Make a 1G swapfile in CWD

SwapFile="~~SWAPFILE.$(date +%H%m%s%N | sha1sum | cut -c1-12)"

   # fallocate -l 1G $SwapFile  \ ## caused issue for f2fs
     dd if=/dev/zero of="$SwapFile" bs=1024 count=1048576 \
  && chmod 600 $SwapFile  \
  && mkswap $SwapFile  \
  && swapon $SwapFile     

echo "MAKE SURE to switch swap off before making $SwapFile inaccessible with"
echo " swapoff $PWD/$SwapFile"