jungle_boy wrote: ⤴
Tue Jul 19, 2016 1:01 pm
In windows OS following this instructions:
1-Download and install the application HashTab
2-Open the directory where you downloaded the ISO image (usually the Download folder),
3-Right click on the downloaded ISO image and select Properties from the menu and check the file hashes tab
4- Cancel the hashing in progress and open setting option and check SHA-256, uncheck other options, let the system calculate again the hash
5-Open the sha256sums.txt file address to check the sum of the sha256sum of downloaded image
https://ftp.heanet.ie/mirrors/linuxmint ... 256sum.txt
6- Highlight and copy the corresponding ISO image sha256sum, past in the Hash comparison space
7-The system compares immediately and warns if they match or not.
Some comments. I am using Windows 10. I expected to find a program called HashTab. After a couple of goes I noticed the instructions which popped up in the default browser. So I found the File Hashes tab in properties, which now appears to become a part of properties for all files.
4. Cancel the hashing in progress to the right of the advancing green bar. It took me ages to find Settings, as I was looking in the wrong places. Settings is in blue, just above Hash Comparison. Ensure only SHA-256 is checked, unchecking all other options. It is probably quicker to click on Select None, and then check SHA-256. Click OK and Hashing Progress will proceed. It will then read Hash Comparison and the Hash Value will appear in the box. It will give a green tick next to SHA-256. It is not finished yet. The green tick at this point does not mean success. You now have to compare this Hash Value with the relevant value in the sha256sum.txt file. Highlight and delete the value in the Hash Comparison box, as this is a copy of the Hash Value above. This box needs to be empty before proceeding.
6. Open the sha256sum.txt file and highlight the relevant Hash Value. This file contains a few hash values. Look for the one which matches the iso you have downloaded. Copy this highlighted section and paste it into the Hash Comparison box. If identical, you will get the green tick.
What I did was to make a copy of the sha256sum.txt with only the relevant hash value remaining. I deleted the rest. That way, when I repeated the test, it was easier. Also, having selected SHA-256 in Settings once, it remains the only one there. But you still have to Cancel the initial hashing. Clicking on Compare a file gave a red cross, even with the amended file. So I don't know what that is doing. I guess HashTab is written by someone else who uses that for some other purpose.
I've written all these words as I got it wrong the first time I did it and it took a few goes to figure it out. Once I did it correctly, it's simple. It doesn't need to be done often, only when you download a new iso.