1) image of Linux mint 18.3 Cinnamon .iso Sylvia and saved it to my hard disk
2) with the Sha256sum.txt
3)and the SHA256 sum.txt.gpg
4) Downloaded Gnupg simple installer from gnupg.org and installed it on my computer
all in a folder. Have opened the command prompt window (DOS window) but could not navigate to the folder where I had stored the same. Therefore I had moved the folder containing all the above files to C:\ drive and navigated the Window command prompt to the folder.
I then emlpoyed the command CertUtil -hashfile file name.iso SHA256 in the command prompt replacing the filename with the path of the dowloaded image of my windows to receive an error
CertUtil is not a recognized internal or external command...operable program or batch file.
As the above method was a fiasco did open my windows powershell command prompt and typed cmd----> enter. The above command was retyped to return the same error as stated previously.
. I can proceed no further as the instructions either lacks pertinent information that is devoid for Windows XP users or the like.CertUtil is not a recognized internal or external command...operable program or batch file.
I implore someone to guide me accurately as to how to check the Integrity and Authenticity from here.
Have downloaded a few tools to verify for the SHA256 sum.txt and Sha256 sum.txt.gpg. They show different hash values on comparison and had hence downloaded three different times from different mirrors. The tool's value and the hash value on the verification txt differs.
the tools are
1) Sha 1 sum.exe
MotherBoard: HP pavillion DV 6838NR
CPU Intel(R) Core(TM)2 Duo CPU
T7700 @ 2.40GH
Memory: 2*2Gb memory cards DDR2
Bios Version: F59. 11/25/2008
Sound device card: Real Tech High Definition Audio
Video Card: Mobile intel(R) 965 Express chipset family
OS: Microsoft Windows XP Professional version 2002 Service pack 3