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Installation

Install Debian version 12.9.0 .iso file from the website www.debian.org.
Open VirtualBox.
Click on New.
Go under the Name and Operating System tab.
Type in the name of the OS which is Debian.
At ISO Image, click the drop down menu and click Other.
Choose the downloaded Debian .iso file.
Go under the Unattended Install tab.
Change the username and password to your liking.
Go under the Hardware tab. You can change the Base Memory and Processors according to your liking. We will keep it as is.
Go under the Hard Disk tab. You can change the hard disk space and other settings. We will keep it as is.
Click Finish.
Wait for the installation to finish.
After installation, it should look like this.
Click the username and sign in using the password you set before.
Debian OS is now installed successfully!