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🛠️ Basic VirtualBox VM Setup (No Custom Installation):
Download ISO: Get a Linux distro ISO (like Ubuntu, CentOS, Fedora, etc.).

Create New VM: In VirtualBox, click New ➔ Give it a name, select type (Linux), and version (e.g., Ubuntu 64-bit).

Memory Allocation: Assign RAM (e.g., 2048 MB for smooth performance).

Create Virtual Hard Disk: Default VDI format ➔ Dynamically allocated ➔ Size (e.g., 20 GB).

Attach ISO: Mount the Linux ISO under Settings > Storage (optical drive).

Default Settings: You can go ahead without modifying things like Network, Display, USB, etc., unless you have a specific requirement.

Start Installation: Boot the VM and install Linux inside it using default recommended options.
📋 Requirements
✅ Oracle VirtualBox – https://www.virtualbox.org/
✅ RHEL 9 ISO File (requires a free Red Hat Developer account) – https://developers.redhat.com/products/rhel/download
✅ A machine with at least 4GB RAM

✅ Key Benefit:
You're learning the standard way first, which builds a strong foundation. Later, you can dive into custom installations like:

Partitioning disks manually

Using different file systems (ext4, xfs, btrfs)

Networking settings (NAT, Bridged, Host-Only)

Snapshots and cloning machines

Resource optimization for lab