Update cheatsheets

linux/a2query

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# a2query
+
+> Retrieve runtime configuration from Apache on Debian-based OSes.
+> More information: <https://manpages.debian.org/latest/apache2/a2query.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 Apache version:
+
+`sudo a2query -v`