Downloading and verifying .iso images
After downloading an operating system .iso image from a distro’s website, it makes sense to run a fast verifying command to see if it has transferred without errors. Here are some good instructions of how it’s done in Windows, Mac OS X or Ubuntu.
So, in Linux, for example, just open the Terminal application (usually Ctrl+Alt+T), go to the directory where the .iso is and run the sha256sum command (might be different depending on what distro you downloaded):
# Change directory to where you downloaded the .iso image (ie. Downloads folder in your Home):
# Run the command (you can use TAB to autocomplete the typing of the file name):
and compare the output (ie. in a text editor, like Mousepad) with the one found in the website.
If the hash values look exactly the same, the .iso image is what it should be. If not, it needs to be downloaded again.