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3.5. Validating in Linux

Open a terminal emulator:
  • on the GNOME desktop, click ApplicationsSystem ToolsTerminal to open GNOME Terminal
  • on the KDE desktop, click Kickoff Application LauncherApplicationsSystemTerminal to open Konsole
Change into the directory that holds the ISO image files, then run sha256sum, for example:
$ cd Downloads
$ sha256sum Fedora-20-i386-DVD.iso
Open the file CHECKSUM with a text editor, such as gedit or kwrite, to display its contents. Make sure the hash displayed by sha256sum for each of the downloaded ISO files exactly matches the corresponding hash in the CHECKSUM file.
If all of the hashes match the hashes found at, you can burn the ISO file to disc. If a file does not match, download it again.