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What's showing in the linux system status logs in /var/log? &nbsp;One of the log files should be indicating why the error occurred. &nbsp;If not, configure /etc/rsyslog.conf to log all messages with &quot;ftp&quot; in them to <a href="ftp://ftp.log" rel="ugc">ftp.log</a>, restart rsyslog, and try the transfer again.
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What's showing in the linux system status logs in /var/log?  One of the log files should be indicating why the error occurred.  If not, configure /etc/rsyslog.conf to log all messages with "ftp" in them to ftp.log [ftp://ftp.log], restart rsyslog, and try the transfer again.

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I think by default root is not allowed to use SFTP, create a new user and give it a password then try again.<br />
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Hope this helps.
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I think by default root is not allowed to use SFTP, create a new user and give it a password then try again.

Hope this helps.

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Are you using SFTP or FTP to connect? &nbsp;The error indicates you're failing to connect to the SFTP (or SSH) port. &nbsp;Did you set up FTP correctly? &nbsp;Did you set up SSH correctly?
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Are you using SFTP or FTP to connect?  The error indicates you're failing to connect to the SFTP (or SSH) port.  Did you set up FTP correctly?  Did you set up SSH correctly?

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trying to connect on a secure port with unsecured connect == the port number for SFTP is different from FTP so if setup Secure FTP and trying to connect via regular ftp port it will not work.
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trying to connect on a secure port with unsecured connect == the port number for SFTP is different from FTP so if setup Secure FTP and trying to connect via regular ftp port it will not work.

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I configured new FTP user in ubuntu linux . but connecting to FTP via Filezilla occured this error .<br />
Received unexpected end-of-file from SFTP server Error: Could not connect to server
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I configured new FTP user in ubuntu linux . but connecting to FTP via Filezilla occured this error .
Received unexpected end-of-file from SFTP server Error: Could not connect to server

FTP Problem

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

Telnet is an application layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. SSH was designed as a replacement for Telnet and for unsecured remote shell protocols. The term telnet is also used to refer to the software that implements the client part of the protocol. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH server.