如何在Ubuntu 17.10服务器上为hacks4liveprojects.com配置子域名？

Hey there! Let's walk through setting up your subdomain somethinghere.hacks4liveprojects.com on your Ubuntu 17.10 server step by step. I'll cover both DNS setup and web server configuration (assuming you're using Apache, the default on Ubuntu, plus a quick note for Nginx users).

First, you need to point the subdomain to your server's public IP address. This is done through your domain registrar's DNS management panel:

• Log in to your domain provider's dashboard (where you purchased hacks4liveprojects.com).
• Navigate to the DNS settings section.
• Add a new A Record:
  • Hostname: Enter somethinghere (this is the prefix for your subdomain)
  • Value: Paste your server's public IPv4 address
  • TTL: Set to 300 (5 minutes) for faster propagation, you can increase it later if needed.
• Alternatively, you can use a CNAME Record pointing to hacks4liveprojects.com, but A records are more straightforward for direct IP mapping.

Note: DNS changes can take anywhere from a few minutes to 24 hours to propagate globally, so give it some time before moving to the next steps.

Ubuntu 17.10 uses Apache's virtual host system to handle multiple domains and subdomains. Here's how to set it up:

1. Create a virtual host configuration file
   Open a terminal on your server and run:

   sudo nano /etc/apache2/sites-available/somethinghere.hacks4liveprojects.com.conf
   

   Paste the following content into the file. Since you want to use /var/www/html/ as the site directory, we'll set that as the DocumentRoot:

   <VirtualHost *:80>
       ServerName somethinghere.hacks4liveprojects.com
       ServerAlias www.somethinghere.hacks4liveprojects.com # Optional, if you want a www prefix for the subdomain
       DocumentRoot /var/www/html/
   
       # Optional: Set up logging for easier debugging
       ErrorLog ${APACHE_LOG_DIR}/somethinghere-error.log
       CustomLog ${APACHE_LOG_DIR}/somethinghere-access.log combined
   </VirtualHost>
   

   Save and exit the editor (in nano, press Ctrl+O, hit Enter, then Ctrl+X).

2. Enable the new virtual host
   Run this command to activate the site:

   sudo a2ensite somethinghere.hacks4liveprojects.com.conf
   

3. Check for configuration syntax errors
   Before restarting Apache, verify your setup has no mistakes:

   sudo apache2ctl configtest
   

   You should see a Syntax OK message if everything is correct.

4. Restart Apache to apply changes

   sudo systemctl restart apache2
   

If you're running Nginx instead of Apache, here's the quick setup:

1. Create a server block configuration file

   sudo nano /etc/nginx/sites-available/somethinghere.hacks4liveprojects.com
   

   Paste this content:

   server {
       listen 80;
       server_name somethinghere.hacks4liveprojects.com www.somethinghere.hacks4liveprojects.com;
   
       root /var/www/html/;
       index index.html index.htm index.nginx-debian.html;
   
       location / {
           try_files $uri $uri/ =404;
       }
   
       # Optional logging
       error_log /var/log/nginx/somethinghere-error.log;
       access_log /var/log/nginx/somethinghere-access.log;
   }
   

   Save and exit the editor.

2. Enable the server block
   Create a symlink to the sites-enabled directory:

   sudo ln -s /etc/nginx/sites-available/somethinghere.hacks4liveprojects.com /etc/nginx/sites-enabled/
   

3. Test Nginx configuration

   sudo nginx -t
   

   Look for a test is successful message to confirm no errors.

4. Restart Nginx

   sudo systemctl restart nginx
   

Once DNS has propagated, you can test in a few ways:

• Ping the subdomain: Run ping somethinghere.hacks4liveprojects.com on your local machine. It should resolve to your server's public IP.
• Visit in a browser: Go to http://somethinghere.hacks4liveprojects.com — you should see the content from /var/www/html/ just like your main domain.

Make sure your Ubuntu server's firewall allows HTTP traffic (port 80). If you're using UFW (the default firewall on Ubuntu 17.10), run:

sudo ufw allow 80/tcp
sudo ufw reload

内容的提问来源于stack exchange，提问作者hacks4live