Can't connect via SCP

dave`2005 · 11-15-2007, 01:25 PM

Hi all,

I recently installed Ubuntu and when trying to connect to it via SCP from my windows machine it just says login denied, do i have to enable SCP somewhere?

Any help appreciated.

indienick · 11-15-2007, 01:42 PM

SCP is for securely copying (SCP = "Secure CoPy") files from client A to client B via SSH.

You don't log in with SCP, it's a one-shot command at copying a file from client A to a specified location at client B:

Code:

$ scp myfile.txt user@host:/home/user

If you're on client B (Windows) trying to log in to client A (Linux), client A needs to have an SSHD (SSH daemon - such as OpenSSH) installed and running, and you need to connect from client B using "ssh user@host".

dave`2005 · 11-15-2007, 05:44 PM

I use winSCP on the windows machine.

I chose openSSH to be installed somewhere in the ubuntu install options i think.

gilead · 11-15-2007, 08:37 PM

You can run the following to see if sshd is running:

Code:

netstat -a | egrep ':(ssh|\b22\b)'

If it is running, you'll see something like this:

Code:

tcp        0      0 *:ssh                   *:*                     LISTEN

I don't know the commands to start/stop daemons on Ubuntu, but it may be something like /etc/init.d/sshd start

Will the Ubuntu box be exposed to the internet? If so, you should change some of the /etc/ssh/sshd_config settings. The main ones I use are:

Code:

Protocol 2
AllowUsers steve
PermitRootLogin no
PasswordAuthentication no
Subsystem       sftp    /usr/libexec/sftp-server

I use public key authentication so I disable password authentication - it's up to you, depending on what you require. Once sshd is running, you should be able to use scp, ssh and sftp as indienick described.