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550 FTP response code
A 550 response code may be sent in response to any command requiring the server to access a local file. It is a permanent negative response, which means the client is discouraged from sending the command again since the server will respond with the same response code.
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Overview
This article provides information on 550 FTP response code.
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A 550 response code may be sent in response to any command requiring the server to access a local file. It is a permanent negative response, which means the client is discouraged from sending the command again since the server will respond with the same response code. It is usually due to a command requiring access to a file that does not exist or that the user does not have access rights to.
Example response
550 Requested action not taken; file unavailable.