Creating a SWAP partition and viewing free space

create-swap.sh

#!/bin/sh

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# To Download and Install/Run
#   $ sudo -H su -c "$(curl -fsSL https://gist.githubusercontent.com/earendildev/727016da258bd110393c8ba50d0a1253/raw --output $HOME/create-swap.sh)"

# Created by earendil.dev@gmail.com

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# List Current Swap Space
swapon --show
printf 'Your Current SWAP Space'
free -h

# Current File System Space
printf 'Checking Current File System Space'
df -h

# Create SWAP
printf 'Creating about 4GB of SWAP'
fallocate -l 4G /swapfile

# Check if it correct
ls -lh /swapfile
printf 'Just checking'

# Grant Permissions to SWAP
printf 'Granting Permissions to the newly created SWAP file'
chmod 600 /swapfile

# Mark file as SWAP
mkswap /swapfile

# Enable SWAP
printf 'Enabling SWAP'
swapon /swapfile

# Verfiy new SWAP - Check memory
printf '\n Verifying the newly created SWAP \n'
swapon --show

printf '\n Show Memory \n'
free -h

printf '\n Perfect.'

# Making SWAP permanent
printf '\n Now lets make the SWAP file permanent'
cp /etc/fstab /etc/fstab.bak
printf '/swapfile none swap sw 0 0' | tee -a /etc/fstab

printf '\n DONE.'

printf '\n Deleting File'
rm $HOME/create-swap.sh

# Exit with Success Code
exit 0