It is because prove command is not in your path
Find it:
find / -type f -name "prove"

[download]

And then run it with full path or include directory in your path

Regards, PD: Sorry I missleveled this answer (should be Re: and not Re^2:)

In reply to Re^2: prove: command not found by i5513
in thread prove: command not found by a_memory

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