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Hosting Operations

Read-only, can be slow

Map Apache Virtual Hosts

You need to find Apache VirtualHost blocks and their names.

Command

grep -RInE '<VirtualHost|ServerName|ServerAlias' /etc/apache2/sites-enabled 2>/dev/null

Before you run this

System impact: Read-only. Can create load on large logs, directories, filesystems, or process tables.

When not to use it: Do not assume ServerAlias coverage is complete without checking redirects and DNS too.

Expected output

VirtualHost, ServerName, and ServerAlias lines with file and line numbers.

System impact

Read-only, can be slow. Nothing changes. The command searches enabled Apache configs.

May require elevated permissions on protected paths or service-owned files.

Scope this to the smallest useful path or service on busy systems.

Recovery / rollback: no state is changed.

When to use it

Use when a domain is served by the wrong Apache virtual host.

When not to use it

Do not assume ServerAlias coverage is complete without checking redirects and DNS too.

next steps

Related commands

Hosting Operations Can be slow

Map Apache Proxy Rules

Apache was up. The reverse proxy target was wrong.

grep -RInE '^[[:space:]]*(ProxyPass|ProxyPassReverse)[[:space:]]' /etc/apache2/sites-enabled 2>/dev/null

Hosting Operations Can be slow

Find Apache Document Roots

Apache was serving files from a different directory than expected.

grep -RInE '^[[:space:]]*DocumentRoot[[:space:]]' /etc/apache2/sites-enabled 2>/dev/null

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Find Web Server Redirect Rules

The redirect loop was hiding in plain text.

grep -RInE 'return[[:space:]]+30[18]|rewrite[[:space:]]|Redirect[[:space:]]|RewriteRule|RewriteCond' /etc/nginx /etc/apache2 2>/dev/null

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Map Nginx Roots and Aliases

The URL was right. The filesystem path was not.

grep -RInE '^[[:space:]]*(root|alias)[[:space:]]' /etc/nginx/conf.d /etc/nginx/sites-enabled 2>/dev/null

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Show Nginx Include Lines

The config was valid; it just was not included.

grep -RInE '^[[:space:]]*include[[:space:]]' /etc/nginx/nginx.conf /etc/nginx/conf.d /etc/nginx/sites-enabled 2>/dev/null

Study mapping

Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.

Independent study support only. No affiliation, endorsement, exam dumps, or real exam questions.