Update cheatsheets

linux/apache2ctl

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# apache2ctl
+
+> Administrate the Apache HTTP web server.
+> This command comes with Debian based OSes, for RHEL based ones see `httpd`.
+> More information: <https://manpages.debian.org/latest/apache2/apache2ctl.8.en.html>.
+
+- Start the Apache daemon. Throw a message if it is already running:
+
+`sudo apache2ctl start`
+
+- Stop the Apache daemon:
+
+`sudo apache2ctl stop`
+
+- Restart the Apache daemon:
+
+`sudo apache2ctl restart`
+
+- Test syntax of the configuration file:
+
+`sudo apache2ctl -t`
+
+- List loaded modules:
+
+`sudo apache2ctl -M`