How to automate sftp without using expect script?

Shell Programming and Scripting
1

How to automate sftp with out using expect script?

My batch file has the password but it is not taking. Please see below.

I want to use this sftp connection in a loop for pushing new files in a directory one at a time. Hence I can not use an expect script.

bash-2.05$ /usr/bin/sftp -b /tmp/Cap_batch username@89.202.125.15
Connecting to 89.202.125.15...
username@89.202.125.15's password:

bash-2.05$ more /tmp/Cap_batch
@passwd!

It would be great if some body can suggest a possible solution.

2

You'll have to set up key authentication so you will be able to use a here-script for automation.
sftp does not work with feeding a password in a script. That's unsecure and that's why keys should be used.
If possible and key authentication is set up, maybe use scp instead of sftp. Might be more comfortable than using a here-script.

For how to set up a passwordless key based communication with ssh/scp/sftp search this forum or the web, there are plenty of guides.
Don't forget to enter no password when creating the key pair with ssh-keygen.

3

Thanks Zaxxon for the prompt reply.

But sftp connection is enabled between a client site. Hence ssh key can not be implemented... :frowning: any other solution...??

4

Hint: SFTP is but a sub-system of SSH...

5

Oh Sorry for the confused reply..! I know that... What I meant is, I can't exchange the ssh keys to the client for some reasons. Any other solutions?

6

Talk to the client, and ask them what they would prefer:

  • Get a public key from you, and implement it so that you can authenticate yourself with it
  • Have the password for their service passed from an expect script where it's possibly easy for everyone to read