[Solved] Verifying ISO

[sdcougar]

I downloaded mint 19 64/Cinnamon

These instructions don't work. I cannot download the files. They open in a browser window when you click on them. No option to download. >

"How to verify ISO images"

This page explains how to verify their integrity and authenticity.

Preparation

1. Create a directory called "ISO" in your home directory.

2. Move the ISO image you downloaded in this directory.

3. Download the following files and move them into the "ISO" directory.
File Description
sha256sum.txt Contains the SHA256 sums to check the integrity of the ISO images.
sha256sum.txt.gpg Signed by the Linux Mint team to check the authenticity of the sha256sum.txt file.

[rickNS]

I've never done it by the "book" seemed more complicated than necessary.

I would just create a file, call it what ever you want, ("mint19check" for example) and copy into it, the hash from the website in this case (mint-19-cinnamon-64) is;
41dd237ed33a4cc5865ef52cd92b479cded0a9341956de4d6adb794e9c1c10a9

The open in a terminal, the folder where the iso you want to check is, and run
sha256sum linuxmint-19-cinnamon-64bit.iso

Wait for it...then copy the terminal output to the file I just created placing it directly under the line that is already there so it is very easy to visually compare. If it checks out delete the "mint19check" file.

It just came up in another thread that also checking the key signing thing is not 100% necessary, I've never done it myself.
viewtopic.php?f=90&t=288200

That's just my way.

EDIT to add exact hash, and command

[pbear]

I cannot download the files. They open in a browser window when you click on them. No option to download.

Surely you've downloaded something off the internet before. Same drill. Right-click the link. A context menu will pop up. In Firefox and Chrome, one of the options will be "Save link as ..." If you use another browser, it has something similar. Selecting the option brings up a dialogue box where you choose where to save the verification files. Will take only seconds (they're tiny). Once saved, you can copy or move them anywhere you like.

[kato181]

I downloaded mint 19 64/Cinnamon

These instructions don't work. I cannot download the files. They open in a browser window when you click on them. No option to download. >

"How to verify ISO images"

This page explains how to verify their integrity and authenticity.

Preparation

1. Create a directory called "ISO" in your home directory.

2. Move the ISO image you downloaded in this directory.

3. Download the following files and move them into the "ISO" directory.
File Description
sha256sum.txt Contains the SHA256 sums to check the integrity of the ISO images.
sha256sum.txt.gpg Signed by the Linux Mint team to check the authenticity of the sha256sum.txt file.

If you d/l the iso from linuxmint website, then you shouldn't need the sha256sum as all the iso's are verified before being available.
If you need them then they are available on their website to d/l. Use the torrent to d/l it.

[Quetzal]

Like rickNS I just use the terminal - and for the same ease of use reason - assuming the website provides the original SHA256 hash reading to check against.


Open terminal and type

sha256sum [drag your ISO or other file here] - after the space

Press 'Enter'


and check the result against the original hash.

For other hashes use 'MD5sum' 'sha512sum' etc.