Hash and compare directories MD5 - SHA - Linux GNU MD5Sum

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Hello,
How to install a module on 4.3.1 so that:
1/ I can hash a directory and output a list of files with their hashing values.
2/ Ideally compare the hashed files with a back-up to pinpoint files changes.

Under Windows I know MD5Summer, which says its output is compatible with
the Linux GNU MD5Sum

Thanks.

Reason.
PC has been attacked and wish to check file by file modified ones.