scp not tolerant of extraneous shell messages

[Edward Avis]

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Perhaps scp could have a special -diagnose option which runs 'echo
hello' at the remote end, and checks that the text received is just
'hello'.  That would save unfortunate users a lot of headscratching in
future.  Of course, this is really a suggestion for the rcp program
since scp is just rcp-over-SSH.

- -- 
Ed Avis <epa98 at doc.ic.ac.uk>
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