Saurabh Barve wrote:
Hi,
I'm trying to do a remote backup of system to a tape drive connected to
another system. I have set up public key authentication between the
systems, so that I can log in as root without passwords. The setup is
like this:
Tape Drive----System A<----->System B
I want to write data from System B on to tape in the tape drive
connected to System A.
To test the connection, I do:
[System A]# ssh System B tar -b 512 --rsh-command=/usr/bin/ssh -tvf
System A:/dev/nst0
However, this gives me an error:
---
Permission denied, please try again.
Permission denied, please try again.
Permission denied (publickey,gssapi-with-mic,password).
tar: SystemA\:/dev/nst0: Cannot open: Input/output error
tar: Error is not recoverable: exiting now
---
Allocating a pseudo-TTY helps in getting the remote tar command to work.
But I'm prompted to enter my key passphrase:
---
[System A]# ssh -t System B tar -b 512 --rsh-command=/usr/bin/ssh -tvf
System A:/dev/nst0
Enter passphrase for key '/root/.ssh/id_rsa':
---
However, I want this to be non-interactive. I can run the tar command
locally on System B and it works fine.
I am running tar-1.15 on both machines. On System A, I'm running OpenSSH
4.2p1, and on System B I'm running OpenSSH 3.6.1p2
Is there a way to do what I want?
Thanks,
Saurabh
It looks like you have set up a ssh keypair (ssh-keygen).
If you set the key's password to the empty string,
you won't be prompted for a password.
If this is too much for a security risk, you can set up a
'tar' user on the remote machine, and use sudo to run tar.
You then set up a passwordless keypair for the 'tar' user.
HTH,
Colin S. Miller
--
Replace the obvious in my email address with the first three letters of the
hostname to reply.
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