The following maker creates a webapp substrate for webapps/websites on Debian environments (I use Ubuntu).

The substrate includes, based on your domain given as an argument:

1. /etc/nginx/sites-available/example.com.conf.
2. etc/nginx/sites-enabled/ symlink.
3. Appropriate DB user and instance, named example.com.
4. Suitable wp-config.php file.
5. Finishes.

I’d especially like to know how I could shorten this code, if at all.

The maker

cat <<-"NWSM" > /opt/nwsm.sh     #!/bin/sh     for domain; do         cat <<-WEBAPPCONF > "/etc/nginx/sites-available/$  {domain}.conf"              server {                 root /var/www/html/$  {domain};                 server_name $  {domain} www.$  {domain};                 location ~*  \.(jpg|jpeg|png|gif|ico|css|js|ttf|woff|pdf)$   {                     expires 365d;                  }                 location / {                     index index.php index.html index.htm fastcgi_index;                     try_files $  uri $  uri =404 $  uri/ /index.php?$  args;                 }                 location ~ \.php$   {                     fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;                     fastcgi_param SCRIPT_FILENAME $  document_root$  fastcgi_script_name;                     include fastcgi_params;                 }             }         WEBAPPCONF         ln -s /etc/nginx/sites-available/$  {domain}.conf /etc/nginx/sites-enabled/          echo "Please enter database user password for user $  {domain}: "         read -s waps         echo "Please enter database root password"         mysql -u root -p <<-MYSQL             create user "$  {domain}"@"localhost" identified by "$  {waps}";             create database $  {domain};             GRANT ALL PRIVILEGES ON $  {domain}.* TO $  {domain}@localhost;         MYSQL          certbot --nginx -d $  {domain} -d www.$  {domain}     done      cd /var/www/html/     wget http://wordpress.org/latest.tar.gz     tar xzvf latest.tar.gz && rm latest.tar.gz     mv wordpress $  {domain}      cp /var/www/html/$  {domain}/wp-config-sample.php /var/www/html/$  {domain}/wp-config.php     echo "1/1: Please enter the password of the site's DB user." && read -s dbup     sed -i "s/database_name_here/$  {domain}"/g /var/www/html/$  {domain}/wp-config.php     sed -i "s/username_here/$  {domain}"/g /var/www/html/$  {domain}/wp-config.php     sed -i "s/password_here/$  {dbup}"/g /var/www/html/$  {domain}/wp-config.php      chown www-data:www-data /var/www/html/* -R     find /var/www/html/* -type d -exec chmod 755 {} \;     find /var/www/html/* -type f -exec chmod 644 {} \;     systemctl restart nginx.service NWSM chmod +x /opt/nwsm.sh