chore(ansible): save outcomes of working with certificates, improve readability

knowledge base/https.md

@@ -0,0 +1,68 @@
+# HTTPS
+
+TODO
+
+Intro
+
+<!-- Remove this line to uncomment if used
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+   1. [Sources](#sources)
+
+## TL;DR
+
+<!-- Uncomment if used
+<details>
+  <summary>Setup</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Usage</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Real world use cases</summary>
+
+```sh
+```
+
+</details>
+-->
+
+## Further readings
+
+- [Website]
+- [Main repository]
+
+### Sources
+
+- [How Does HTTPS Work? RSA Encryption Explained]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+<!-- In-article sections -->
+<!-- Knowledge base -->
+<!-- Files -->
+<!-- Upstream -->
+[main repository]: https://github.com/project/
+[website]: https://website/
+
+<!-- Others -->
+[how does https work? rsa encryption explained]: https://tiptopsecurity.com/how-does-https-work-rsa-encryption-explained/

knowledge base/openssl.md

@@ -1,7 +1,5 @@
 # OpenSSL
 
-## Table of contents <!-- omit in toc -->
-
 1. [TL;DR](#tldr)
 1. [Create a self signed certificate](#create-a-self-signed-certificate)
 1. [Display the contents of a SSL certificate](#display-the-contents-of-a-ssl-certificate)
@@ -47,6 +45,7 @@ openssl req -text -noout -verify -in 'request.csr'
 
 # Check existing keys and verify their consistency.
 openssl rsa -check -in 'file.key'
+openssl rsa -check -in 'file.key' -noout
 
 # Check certificates or keys and return information about them.
 openssl x509 -text -noout -in 'certificate.crt'
@@ -123,7 +122,8 @@ To avoid answering the questions (for automation), add
 
 ```sh
 $ openssl req -x509 -out 'cert.pem' \
-  -newkey 'rsa:4096' -keyout 'key.pem' -days '365' -nodes -subj "/C=NL/ST=Nederlands/L=Amsterdam/O=Mek Net/OU=Org/CN=mek.info"
+  -newkey 'rsa:4096' -keyout 'key.pem' -days '365' -nodes \
+  -subj "/C=NL/ST=Nederlands/L=Amsterdam/O=Mek Net/OU=Org/CN=mek.info"
 Generating a 4096 bit RSA private key
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