Digital Ocean droplet setup (4GB)

#!/bin/bash

echo "-------------------------------"
echo "Starting user-data execution..."
echo "-------------------------------"

cd /root

# 
# Setup swap for better performance
# Note: Swap file size should generally be double the RAM, up to a 4G max
# 
fallocate -l 4G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
cp /etc/fstab /etc/fstab.bak
echo '/swapfile none swap sw 0 0' | tee -a /etc/fstab
sysctl vm.swappiness=10
echo "vm.swappiness=10" >> /etc/sysctl.conf
sysctl vm.vfs_cache_pressure=50
echo "vm.vfs_cache_pressure=50" >> /etc/sysctl.conf

# 
# Setup Additional Entropy for Cloud Servers Using Haveged
# https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged
# 
apt-get install -y haveged
update-rc.d haveged defaults


# 
# Additional packages and utils
# 
apt-get install -y direnv

#
# bash setup
#
wget https://gist.githubusercontent.com/edjames/80e95379caefbe35f3bb51178400560a/raw/6615a5a80ab1352bc363f3340eeff89e947cbe11/.bash_login .bash_login
wget https://gist.githubusercontent.com/edjames/ff80ccbaafd0b51cb2e1f19ed349ba5e/raw/bafa8fe507957c4b1f9c567039976b0360f35715/.bash_logout .bash_logout
wget https://gist.githubusercontent.com/edjames/e5c706393517b7a0e5ae2c9dd6d15aba/raw/200d63bb8bd6940c68495fe2c68525adbbe851cd/.bashrc .bashrc

echo "-------------------------------------------"
echo "User-data execution completed successfully."
echo "-------------------------------------------"