From af8f1729ead13eb79792aaa54968b051b2866839 Mon Sep 17 00:00:00 2001
From: Hugh Ratsch <hugh.ratsch.18@gmail.com>
Date: Tue, 18 Feb 2025 18:23:21 -0600
Subject: [PATCH] updated notes

---
 src/rhcsa.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/rhcsa.md b/src/rhcsa.md
index ce7aeb9..7a86117 100644
--- a/src/rhcsa.md
+++ b/src/rhcsa.md
@@ -714,4 +714,12 @@ sudo dnf group remove "Development Tools" # Remove the Development Tools group
 sudo dnf history # Display the history of the packages
 sudo dnf history undo 1 # Undo the last package installation
 sudo less /var/log/dnf.rpm.log # Display the dnf log
+```
+
+### dd 
+> Note: dd is used to copy and convert files and is used to create disk images.
+```bash
+sudo dd if=/dev/sr0 of=/optical-rhel.iso bs=1M # Create an ISO image of the optical drive
+
+sudo dd if=/dev/sr0 of=/optical-rhel.iso bs=1M status=progress # Create an ISO image of the optical drive with progress
 ```
\ No newline at end of file