Unattendes ssh

[Lukas Grijander]

Hi all.

I've just installed openssh 3.1p1

I'm using ssh as a substitute of telnet, it works fine, but ...

Now, I need to use it like I'm ussing rcp and rsh (not restricted shell, r* command) :

machine1 # rsh machine2 ls -l

whithout giving password, using .rhosts file

machine1 # ssh machine2 ls -l

ask me for password ...

How can I do it?

Thanks in advance.

Rafa

[Darrell Allen · Accepted solution]

Hi Rafa,

Check out this thread:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x319d8cc5e03fd6118fff0090279cd0f9,00.html

Darrell

[Craig Rants]

Attached are my notes for installation and trust configuration. Let me know if you have any problems.

GL,
C

[Lukas Grijander]

THANK YOU VERY MUCH

[Sridhar Bhaskarla]

Hi Rafael,

You need to generate your public/private key pair and copy the public key to the other system.

Before that you need to start sshd and if you haven't already done, use the following process to generate host key.

On system A have sshd runnign with the following procedure.

#/opt/openssh2/bin/ssh_keygen -t rsa1 -f /opt/openssh2/etc/ssh_host_key -N ""
#/opt/openssh2/bin/ssh_keygen -t rsa -f /opt/openssh2/etc/ssh_host_rsa_key -N ""
#/opt/openssh2/bin/ssh_keygen -t dsa -f /opt/openssh2/etc/ssh_host_dsa_key -N ""

Start sshd
#/opt/openssh2/sbin/sshd

Following the above procedure for system B if you want to do ssh from system A to system B.

Setup SSH-client on systemB

Generate public/private key pair on systemB

#/opt/openssh2/bin/ssh_keygen

(take the default file for the key and enter a passphrase here.. you need to remember)

#Now ftp $HOME/.ssh/identity.pub to systemA and append it to $HOME/.ssh/authorized_keys. If you don't have authorized_keys.

Now do ssh from systemB to systemA.

systemB#ssh systemA ls -al

Now this should ask for the passphrase that you typed in while creating the key. After typing in the passphrase, it should execute ls -al on system A.

However, here you still need to type the passphrase. There is a way to remember the passphrases in the memory. You need to use ssh-agent to remember the passphrases.

systemB#eval `/opt/openssh2/bin/ssh-agent -s` /opt/openssh2/bin/ssh-add
This will ask for the passphrase. Type in and it will be remembered.
systemB# ssh systemA ll
systemB# ssh systemA cat /etc/passwd

Repeat the same procedure on systemA if you need the otherway.

-Sri