This article contains information about checking the integrity of the downloaded ISO image before burning it to a media.
Corrupted ISO images can lead to problems during installation. Therefore, it is a good practice to check the integrity of the downloaded ISO image.

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Instructions

Checking the Integrity of the ISO Image in Linux Operating System

Md5sum

Md5sum is a Linux command line utility to generate and verify the MD5 digests by using the MD5 algorithm. This is helpful for detecting file corruption.
Download pages provide md5sum digests for ISO images to verify against the file once it is downloaded. You can use md5sum to generate the md5 digest on your computer and verify it against the one available on the website. If they differ, then the downloaded ISO image is corrupt.

Command Syntax:

# md5sum [OPTION] [FILE]
Following is a sample of the simplest form of this command:
# md5sum <iso-file>
For more command options, refer the man page for md5sum.

Sha256sum

Sha256sum is another Linux command line utility used to compute and check the SHA256 message digest algorithm. Along with Md5sum, it is used for detecting file corruption as well.
Download pages also provide sha256sum digests for ISO images to verify against the file once it is downloaded. You can use sha256sum to generate the sha256 digest on your computer and verify it against the one available on the website. If they differ, then the downloaded ISO image is corrupt.
Command Syntax:

# sha256sum [OPTION] [FILE]
Following is a sample of the simplest form of this command:
# sha256sum <iso-file>
For more command options, refer the man page for sha256sum.

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This article contains information about checking the integrity of the downloaded ISO image before burning it to a media.