protocol error : expected control record

[Nico Kadel-Garcia]

The "solution" is to use "rsync -e ssh", which is often far more efficient and idem potent.

Nico Kadel-Garcia
Email: nkadel at gmail.com
Sent from iPhone

> On Mar 19, 2014, at 16:46, Ángel González <keisial at gmail.com> wrote:
> 
>> On 17/03/14 11:48, RAVI PRATAP Singh wrote:
>> Hi All,
>> 
>> During scp, I am seeing this message
>> protocol error : expected control record
>> 
>> This message came because scp sink was expecting the message starting from
>> 'C' or 'D' , something like C0644 299 group or D0755 0 docs but during dns
>> query we were printing "Using IP address" message on the stdout.
>> 
>> So , the message in the buffer was "Using IP address" and thus message
>> "protocol error : expected control record" was thrown.
>> 
>> 
>> Is openssh scp should always expect 'Cmmmm' or 'Dmmmm' messages ? Is fix
>> available for taking care scenario where on stdout something is printed.
>> 
>> Thanks
>> Ravi Pratap
> 
> That's a known drawback of scp, messages on stdout by other programs interfere with it. The “solution” is to .use sftp instead.
> Anyway, you should only be printing that message on interactive sessions.
> 
> Commands like:
> ssh myhost "cat /etc/passwd" > passwd-copy
> shouldn't be prefixed with the ip address you were using :)
> 
> 
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