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I need to upload files from a headless raspberry pi to a remote server.

A simpfied example:

The file to transfer /tmp/test.html

Remote location: something.com Port 22 Username: user1 Password: pass:?word

Remote directory /www/fileadmin/subdir/

I can access the remote location from windows using the WinSCP with the SFTP protocoll. Note: The real password contains a colon and questionmark just like in the example, which may cause extra problems.

What do I need to do to upload a file from raspbian/debian?

  • have you tried to make an ssh connection from your RPi to the remote server? Were you able to connect? – Seamus Jan 9 at 23:39
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scp /tmp/test.html user1@something.com:/www/fileadmin/subdir/

System will then prompt you for a password.

If you want this to work without a password prompt you'll need to set up ssh key based authentication.

  • Thanks, the problem is, this is a remote service I have no control over, so switching to ssh key based authentification is not an option because I have to work with what's available. – 576i Jan 10 at 8:53
  • @576i There is a tool called sshpass that you can install on RPi (apt-get/aptitude install sshpass) but I recommend against it. It is very bad habit to put ssh pasword anywhere else except your own head. Also check out this answer: stackoverflow.com/questions/50096/how-to-pass-password-to-scp – Mariusz Zieliński Jan 10 at 9:00
  • @576i Typically if you can ssh to your host with a password then ssh-copy-id user1@something.com should be able to set-up public key authentication on the host for you. Of course, you need to have prepared a password-less public key beforehand. – Roger Jones Jan 10 at 10:34
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If you have a real sftp server on the remote side then you should be able to login and execute commands:

rpi ~$ sftp -P 22 user1@something.com   # you can omit default -P 22
user1@something.com's password:
Connected to something.com.
sftp> mkdir www/
sftp> mkdir www/fileadmin/
sftp> mkdir www/fileadmin/subdir/
sftp> cd www/fileadmin/subdir/

sftp> put /tmp/test.html
Uploading /tmp/test.html to /home/user1/www/fileadmin/subdir/test.html
/tmp/test.html                                100%   12    10.9KB/s   00:00

sftp> ls -l
-rw-r--r--    1 user1    user1          12 Jan 10 23:53 test.html
sftp> exit
rpi ~$

To upload the file in one batch you can execute:

rpi ~$ sftp user1@something.com:www/fileadmin/subdir/ <<< $'put /tmp/test.html'
user1@something.com's password:
Connected to something.com.
Changing to: /home/user1/www/fileadmin/subdir/
sftp> put /tmp/test.html
Uploading /tmp/test.html to /home/user1/www/fileadmin/subdir/test.html
/tmp/test.html                                100%   12    15.7KB/s   00:00
rpi ~$

The opposite for downloading is:

rpi ~$ sftp user1@something.com:www/fileadmin/subdir/test.html /tmp/test.html
user1@something.com's password:
Connected to something.com.
Fetching /home/user1/www/fileadmin/subdir/test.html to /tmp/test.html
/home/user1/www/fileadmin/subdir/test.html       100%   12     8.1KB/s   00:00
rpi ~$

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