Set WordPress file permissions on Ubuntu 16.04

wp-permissions.sh

#!/bin/bash
# Automatically sets appropriate permissions on WordPress files
# ===== Expects multiple sites stored under /var/www/{sitename}/html

if [[ $* == *--all* ]]; then
  echo "Reset permissions for all WordPress sites? (Y/n)"
  read accept

  find /var/www -name 'wp-config.php' -exec dirname {} \; > ~/wp_list.txt
else
  if [ -z $1 ]; then
    echo "Please enter a domain name."
    exit
  fi
  pub_html="/var/www/${1}/html"

  echo "Does this look correct? ${pub_html} (Y/n)"
  read accept

  echo ${pub_html} > ~/wp_list.txt
fi

if [ $accept == 'Y' ]; then
  while read pub_html; do
      sudo chown -R www-data:www-data ${pub_html}
      sudo find ${pub_html} -type f -exec chmod 644 {} +
      sudo find ${pub_html} -type d -exec chmod 755 {} +
      sudo find ${pub_html} -type d -exec chmod g+s {} \;
      sudo chmod g+w ${pub_html}/wp-content/
      sudo chmod -R g+w ${pub_html}/wp-content/themes
      sudo chmod -R g+w ${pub_html}/wp-content/plugins
      if [ -d "${pub_html}/wp-content/cache" ]; then
        sudo chmod -R g+w ${pub_html}/wp-content/cache
      fi
      if [ -d "${pub_html}/wp-content/upgrade" ]; then
        sudo chmod -R g+w ${pub_html}/wp-content/upgrade
      fi
      if [ -d "${pub_html}/wp-content/db-backups" ]; then
        sudo chmod -R g+w ${pub_html}/db-backups
      fi
      if [ -d "${pub_html}/wp-content/wflogs" ]; then
        sudo chmod -R g+w ${pub_html}/wp-content/wflogs
      fi
      if [ -f "${pub_html}/wp-content/wp-cache-config.php" ]; then
        sudo chmod g+w ${pub_html}/wp-content/wp-cache-config.php
      fi
  echo "Permissions reset for ${pub_html}"
  done < ~/wp_list.txt
fi

rm ~/wp_list.txt