a2disconf, a2dismod, a2dissite, a2enconf, a2enmod, a2ensite, a2query: add page (#3609)

pages/linux/a2disconf.md

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+# a2disconf
+
+> Disable an Apache configuration file on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2disconf.8.en.html>.
+
+- Disable a configuration file:
+
+`sudo a2disconf {{configuration_file}}`
+
+- Don't show informative messages:
+
+`sudo a2disconf --quiet {{configuration_file}}`

pages/linux/a2dismod.md

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+# a2dismod
+
+> Disable an Apache module on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2dismod.8.en.html>.
+
+- Disable a module:
+
+`sudo a2dismod {{module}}`
+
+- Don't show informative messages:
+
+`sudo a2dismod --quiet {{module}}`

pages/linux/a2dissite.md

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+# a2dissite
+
+> Disable an Apache virtual host on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2dissite.8.en.html>.
+
+- Disable a virtual host:
+
+`sudo a2dissite {{virtual_host}}`
+
+- Don't show informative messages:
+
+`sudo a2dissite --quiet {{virtual_host}}`

pages/linux/a2enconf.md

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+# a2enconf
+
+> Enable an Apache configuration file on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2enconf.8.en.html>.
+
+- Enable a configuration file:
+
+`sudo a2enconf {{configuration_file}}`
+
+- Don't show informative messages:
+
+`sudo a2enconf --quiet {{configuration_file}}`

pages/linux/a2enmod.md

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+# a2enmod
+
+> Enable an Apache module on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2enmod.8.en.html>.
+
+- Enable a module:
+
+`sudo a2enmod {{module}}`
+
+- Don't show informative messages:
+
+`sudo a2enmod --quiet {{module}}`

pages/linux/a2ensite.md

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+# a2ensite
+
+> Enable an Apache virtual host on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2ensite.8.en.html>.
+
+- Enable a virtual host:
+
+`sudo a2ensite {{virtual_host}}`
+
+- Don't show informative messages:
+
+`sudo a2ensite --quiet {{virtual_host}}`

pages/linux/a2query.md

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+# a2query
+
+> Retrieve runtime configuration from Apache on Debian-based OSes.
+> More information: <https://manpages.debian.org/buster/apache2/a2query.1.en.html>.
+
+- List enabled Apache modules:
+
+`sudo a2query -m`
+
+- Check if a specific module is installed:
+
+`sudo a2query -m {{module_name}}`
+
+- List enabled virtual hosts:
+
+`sudo a2query -s`
+
+- Display the currently enabled Multi Processing Module:
+
+`sudo a2query -M`
+
+- Display the Apache version:
+
+`sudo a2query -v`