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8.5.2. Verifying Boot Media

You can test the integrity of an ISO-based installation source before using it to install Fedora. These sources include DVDs and ISO images stored on a local hard drive or NFS server. Verifying that the ISO images are intact before you attempt an installation helps to avoid problems that are often encountered during installation.
To test the integrity of an ISO image, append the to the boot loader command line. Note that this option is used automatically if you select the default installation option from the boot menu (Test this media & install Fedora).