The reliable pattern is one server { ... } block per website, stored in its own file and loaded by the running nginx.conf. Ubuntu and Debian packages normally use /etc/nginx/sites-available/ for source files and symlinks in /etc/nginx/sites-enabled/ to turn sites on. Other installations commonly load separate *.conf files from /etc/nginx/conf.d/ through an include directive inside the http block.
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After creating or changing a site file, verify that the file is actually included, give the site an appropriate server_name and listen configuration, run sudo nginx -t, and reload NGINX. A reload applies valid changes without stopping the service.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesWhat separate NGINX files actually do
NGINX does not discover a configuration file merely because it exists in a familiar directory. The effective configuration starts with the main file, usually called nginx.conf, and follows every include directive it contains. Splitting sites into separate files is therefore an organizational and operational choice; the files become active only when the running configuration includes them.
For HTTP traffic, the top-level http { ... } context contains one or more server { ... } blocks. Each server block describes a virtual host: which address or port it listens on, which host names it answers, where its content is located, and how request paths are handled. A location { ... } block belongs inside a server block and controls URI-specific behavior.
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This hierarchy matters when you edit files. A HTTP server block cannot be placed directly at the top level, and an include intended to load HTTP server blocks must be inside http { ... }. NGINX also has separate top-level contexts such as events, mail, and stream; files containing HTTP virtual hosts should not be included in those contexts.
Choose the layout used by your installation
Use the convention supplied by your operating-system package or build. The directory names are not interchangeable unless the main configuration explicitly includes them.
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|---|---|---|---|---|
| Ubuntu/Debian package convention | /etc/nginx/sites-available/<site-name> |
Create a symlink with the same name in /etc/nginx/sites-enabled/ |
Packaged Ubuntu or Debian servers following their documented multi-site workflow | Remove the enablement symlink; keep the source file intact |
| Include-based convention | Often /etc/nginx/conf.d/<site-name>.conf |
The main file includes a wildcard such as /etc/nginx/conf.d/*.conf |
Upstream NGINX installations and distributions that provide a conf.d include |
Move or rename the file so it no longer matches the include, or remove its include line |
Ubuntu Server documentation describes sites-available and sites-enabled as the directories for multiple websites. Debian documentation describes files in sites-enabled as symlinks to files in sites-available, and treats conf.d/*.conf as an additional configuration directory. F5 NGINX documentation describes splitting configuration into feature-specific files in /etc/nginx/conf.d and loading them with include.
Check the active configuration before adding a site
Do not assume that the path on one server matches the path on another. First identify the binary and configuration path used by the running installation:
- Run
nginx -Vand note the compiled configuration path reported by the build. - Open that main configuration file and locate the
http { ... }block. - Look for an existing
includematchingsites-enabled,conf.d, or another directory. - Use
sudo nginx -Twhen you need to see the complete, merged configuration, including files pulled in by every include. This is the authoritative view for diagnosing ordering, duplicate names, and unexpected defaults.
If no include loads the directory you plan to use, either place the file in a directory already included by the configuration or add an appropriate include in the http context. An unused file in /etc/nginx/sites-available or /etc/nginx/conf.d has no effect.
Set up a site on Ubuntu or Debian
1. Create the document root
Choose a separate directory for the site’s files. For example, create /srv/example.test/html and put the site’s index.html and other assets there. Keeping roots separate prevents one virtual host from accidentally serving another site’s files and makes backups or removal more predictable.
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2. Write one complete server block
Create /etc/nginx/sites-available/example.test with a complete HTTP server block:
server {
listen 80;
listen [::]:80;
server_name example.test www.example.test;
root /srv/example.test/html;
index index.html;
location / {
try_files $uri $uri/ =404;
}
}The two listen directives cover IPv4 and IPv6 on port 80. The server_name line lists the host names this block should answer. The root and index directives define the document root and default file, while try_files serves an existing path and returns HTTP 404 when neither the requested file nor directory exists.
Use a filename that identifies the site, but remember that the filename itself does not determine request routing. NGINX uses the directives inside the file after it has been included.
3. Enable the file with a symlink
On the Ubuntu/Debian layout, enable the source file without copying it:
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4. Decide what to do with the packaged default site
A newly installed package may have a default-site symlink that answers requests not matched by your intended host names. If that behavior is undesirable, inspect the default file and remove only its enablement symlink:
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sudo rm /etc/nginx/sites-enabled/defaultDo this only after checking the consequences. The default server can be useful as a deliberate catch-all, diagnostic response, or temporary landing page. Removing it is not required for every multi-site setup.
5. Validate and reload
After creating the file or symlink, validate the complete configuration:
sudo nginx -tProceed only when the test reports a successful syntax check. Then apply the change with a graceful reload:
sudo systemctl reload nginxA reload keeps the service running while workers adopt the validated configuration. If the test fails, correct the reported file and line instead of reloading a broken configuration.
Add a second and third site
Repeat the same pattern for each additional domain: create a separate document root, create a separate file in sites-available, give it the correct server_name values and root, create its enablement symlink, test, and reload. Each file can contain several related host names, such as a bare domain and its www name, but unrelated sites should not share a server block unless you intentionally want identical behavior.
Multiple domains commonly share port 80 or port 443. NGINX can distinguish them by the Host header when their server_name values are different. The Ubuntu example also demonstrates distinct listen ports when that is the chosen design. A different port is not inherently required for every domain; the address, port, and host-name combination must match the traffic you expect and the syntax supported by the installed package.
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For a second site, for example, create /etc/nginx/sites-available/second.example with its own server_name second.example and root such as /srv/second.example/html, then enable it with a matching symlink. Do not edit the main nginx.conf for every new site when the package already includes sites-enabled/*; the symlink is the intended per-site switch.
Use the conf.d layout on other installations
Some installations do not provide the Debian-style directories. Check the active configuration path with nginx -V, open the reported nginx.conf, and confirm that its http block contains an include such as:
include /etc/nginx/conf.d/*.conf;The include must be inside http { ... } when the files contain HTTP server blocks. Do not place this include at the top level or inside events { ... }.
Create a file such as /etc/nginx/conf.d/example.test.conf containing the same complete server block shown earlier. The .conf suffix matters when the wildcard includes only files ending in that suffix. Once the file exists, run the configuration test and reload commands described above. If the test succeeds but the site is not active, inspect the merged output from sudo nginx -T to confirm that the file was read.
To disable this style of site temporarily, remove or rename the file so it no longer matches the wildcard, then test and reload. Keeping the file under version control or renaming it is safer than deleting configuration you may need again.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Understand how NGINX chooses a server block
When a request arrives, NGINX first considers the local address and port selected by the listen directives. For HTTP requests that include a host name, it then compares the request’s Host header with the server_name values available on that address and port. A request whose DNS name points to your server can still reach the wrong site if the host header does not match, if another block is the default for that listener, or if the desired file was never included.
A default_server designation or an enabled packaged default site can therefore catch requests that do not match your names. Check for those definitions in the merged configuration rather than guessing from filenames. Distinct server_name values are normally sufficient for several domains on the same HTTP port; separate ports are useful when you intentionally expose different services or follow a package’s example requiring them.
DNS is a separate dependency. The domain’s records must point to the server’s address before an ordinary browser request can reach the intended block. Testing locally with a request that supplies the correct host header can help distinguish DNS problems from NGINX routing problems.
Validate every change before it reaches users
Use this sequence whenever you add, remove, or edit a site:
- Confirm the file is located in a directory that the active
nginx.confactually includes. - Check that the
serverblock is inside an HTTP include and that braces are balanced. - Verify the spelling of every
server_name, the intendedlistenaddress and port, and the document-root path. - Run
sudo nginx -tand fix every reported error. - Run
sudo nginx -Tif the syntax test passes but ordering, duplicate definitions, or an unexpected default remains unclear. - Reload with
sudo systemctl reload nginxonly after validation succeeds. - Make a request using the exact domain name and inspect the response. If it still reaches another site, continue with the routing checks below.
Troubleshoot the common failure modes
The new site always shows the default page
- Check that the enablement symlink exists and points to the intended file.
- Use
sudo nginx -Tto prove that the server block is present in the effective configuration. - Confirm that the browser request’s host name exactly matches a
server_namein that block. - Look for an unintended
default_serveror an enabled default-site symlink. - Verify that DNS for the domain points to this NGINX host rather than another address.
NGINX refuses to reload
- Run
sudo nginx -tdirectly and read the file name and line number in the error. - Check for a missing semicolon, unmatched brace, invalid directive context, or a path typo.
- Ensure that a file included from
httpcontains HTTP directives rather than directives intended for another context. - Do not remove working configuration to silence an error; correct the reported file, test again, and reload only after a successful result.
The test passes but the response is wrong
- Print the merged configuration with
sudo nginx -Tand look for duplicateserver_nameentries on the same listener. - Check whether the request uses IPv4 or IPv6 and whether both corresponding
listendirectives are configured as intended. - Confirm that the requested URL maps beneath the configured
rootand that the expected index file exists. - Inspect NGINX’s error log and the service logs for permission, file-not-found, or upstream errors after routing has been verified.
Disabling a site has no visible effect
- On Ubuntu/Debian, remove the symlink in
sites-enabled, not the source file insites-available, then test and reload. - On a
conf.dlayout, make sure the renamed file no longer matches the configured wildcard. - Check
nginx -Tafter reloading to ensure no second copy of the same server block remains enabled.
Organize files for long-term maintenance
Give files stable, recognizable names based on the domain or service they configure. Keep one site’s root, host names, locations, and related directives together unless a deliberate shared include improves consistency. When you do use shared snippets, verify their context: a snippet containing location directives belongs inside a server block, while a snippet containing server blocks belongs inside http.
Use the source-file-plus-enable-link model to separate configuration from activation. It lets you prepare a site without serving it, disable a site without losing its settings, and review the exact set of active links. In a conf.d layout, the equivalent is a clearly named file whose presence in the wildcard directory is the enablement decision.
Keep a record of which host names, addresses, ports, and document roots belong together. This is especially useful when several domains share port 80 or 443, because a typo in one server_name can send requests to a different matching or default block. Always make the configuration test part of the change procedure, not an optional check after a failed reload.
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Layout decision at a glance
| Question | Use sites-available/sites-enabled |
Use conf.d |
|---|---|---|
Does the package already include sites-enabled/*? |
Yes; follow that convention. | Only if a separate conf.d/*.conf include is active. |
| How is a site enabled? | Create a symlink from sites-enabled to sites-available. |
Place a matching *.conf file in the included directory. |
| How is a site disabled while retaining its source? | Remove its enablement symlink. | Rename or move the file so it no longer matches the include. |
| What is portable across installations? | The virtual-host pattern and validation steps, not the directory names. | The virtual-host pattern and validation steps, not the directory names. |
The portable principle is simple: one independently identifiable server block per site, an explicit include path, matching host and listener settings, a successful configuration test, and a reload. The directory convention is packaging policy layered on top of that principle.
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