Additional testing for 9.0

docs/guides/email/postfix_reporting.md

@@ -1,5 +1,12 @@
 ---
 title: Postfix Process Reporting
+author: Steven Spencer
+contributors: Ezequiel Bruni
+tested with: 8.5, 8.6, 9.0
+tags:
+  - email
+  - reports
+  - tools
 ---
 
 # Using Postfix For Server Process Reporting
@@ -32,6 +39,14 @@ Aside from postfix, we will need _mailx_ for testing our ability to send emails.
 
 `dnf install postfix mailx`
 
+!!! important "Rocky Linux 9.0 Changes"
+
+    This procedure works perfectly fine in Rocky Linux 9.0. The difference here is where the `mailx` command comes from. While you can install it by name in 8.x, `mailx` comes from the appstream package `s-nail` in 9.0. To install the needed packages, you need to use:
+
+    ```
+    dnf install postfix s-nail
+    ```
+
 ## Testing And Configuring Postfix
 
 ### Testing Mail First

docs/guides/file_sharing/secure_ftp_server_vsftpd.md

@@ -2,7 +2,7 @@
 title: Secure FTP Server - vsftpd
 author: Steven Spencer
 contributors: Ezequiel Bruni
-tested with: 8.5
+tested with: 8.5, 8.6, 9.0
 tags:
   - security
   - ftp
@@ -242,7 +242,10 @@ Remember that this was set up in the [Setting Up Virtual Users section above.](#
 
 We need to create the file that contains the virtual user's configuration:
 
-`vi /etc/vsftpd/vsftpd_user_conf/username`
+```
+mkdir /etc/vsftpd/vsftpd_user_conf
+vi /etc/vsftpd/vsftpd_user_conf/username
+```
 
 This will have a single line in it that specifies the virtual user's local_root: