updated notes

src/rhcsa.md

@@ -722,4 +722,15 @@ sudo less /var/log/dnf.rpm.log # Display the dnf log
 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
+
+### mounting an iso image using /etc/fstab
+```bash
+sudo nano /etc/fstab
+
+# Add the following line to the fstab file:
+/path/to/iso /mnt/iso iso9660 defaults 0 0
+
+sudo mount -a # Mount the ISO image
+sudo umount /mnt/iso # Unmount the ISO image
 ```
+