21

I've been trying to issue commands using plink to retrieve information from my external server. Note that these plink commands are run from a binary that expects no input from the user. Is there a flag that will allow me to override this error message and continue with program output?

The server's host key is not cached in the registry. You
have no guarantee that the server is the computer you
think it is.
The server's rsa2 key fingerprint is:
ssh-rsa 2048 **:**:**:**:**:**:**:**:**:**:**:**:**:**:**:**
If you trust this host, enter "y" to add the key to
PuTTY's cache and carry on connecting.
If you want to carry on connecting just once, without
adding the key to the cache, enter "n".
If you do not trust this host, press Return to abandon the
connection.
Store key in cache? (y/n)

Thank you!

  • The real issue is that either git doesn't properly give away input to plink or vice versa plink doesn't properly take it. If you launch git clone in, e.g. "git bash", the input (Y/n) goes then into bash prompt, and bash usually responds with bash: y: command not found. – andrybak Nov 18 '15 at 15:47
  • You might use klink from kitty's project. This's the fork of putty. There's the key: -auto-store-sshkey. – paxlo Feb 28 at 15:27
19

Try prepending your script with:

echo y | plink -ssh root@REMOTE_IP_HERE "exit"

This will pipe the y character through stdin to plink when you get the Store key in cache? (y/n) prompt, allowing all further plink commands to pass through without the need of user input. The exit command will close the SSH session after it has been established, allowing the following plink commands to run.

Here's an example script which writes the external server's Unix time to a local file:

echo y | plink -ssh root@REMOTE_IP_HERE "exit"
plink -ssh root@REMOTE_IP_HERE "date -t" > remote_time.tmp

Pipelining Reference: http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-4.html

-1

maybe, it will help:

plink -auto_store_sshkey -batch 192.211.158.256 -l user -pw password command
  • 1
    -auto_store_sshkey is an "unknown option" for plink version 0.63 – Nathan Aug 20 '14 at 18:49
  • Unknown to 0.66 too – Joril Dec 18 '15 at 14:39
  • ...and unknown to 0,70 – Gerrat Mar 14 '18 at 15:21

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.