certutil -hashfile FILENAME sha256
^^^^^^^^
use actual file name here
This article assumes you know how to…
launch a terminal emulator,
identify the command-line shell you are using (Bash, CMD, PowerShell, etc.), and
use the command line.
I’m in the midst of
trying some Linux distributions
and for each .iso file
that
I download,
I need to check its
SHA-256
checksum
as part of making
sure I
don’t
install
a trojan horse operating system.
Below I describe three ways
to determine the
SHA-256
checksum of a file
named FILENAME.
Launch a terminal emulator
and change directory (cd) to the directory that contains FILENAME.
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💡
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On Windows, the following is an easy way to do this.
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certutil command (PowerShell and cmd.exe)To check if the certutil command is available, run where.exe certutil
To check if FILENAME is in the current directory, run
dir
or
dir |more
To display the SHA-256 checksum of FILENAME, run
certutil -hashfile FILENAME sha256
^^^^^^^^
use actual file name here
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💡
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To avoid typing more than the first few characters of FILENAME, you can use tab completion. |
sha256sum command (most Unix-like shells)In a Unix-like shell, including Git Bash,[3] run the following commands.
To check if the sha256sum command is available, run which sha256sum
To check if FILENAME is in the current directory, run
ls
or
ls |less
To display the SHA-256 checksum of FILENAME, run
sha256sum FILENAME
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💡
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To avoid typing more than the first few characters of FILENAME, you can use tab completion. |
If you have installed 7-Zip and selected the option called…
…then CRC-SHA > SHA-256 will be
available when you Right-click on FILENAME
in your GUI file manager.
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To view and possibly edit 7-Zip’s options,
launch 7zFM (7-Zip File Manager) and
choose Options… from the Tools menu.
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For more about privacy and security, see Infinite Ink’s…
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