Shell Programming and Scripting

hi,
i want copy one or group of file from a computer to others, but i have some problem that do not allow me to do this.
i do this by scp command like this :

Code:

scp <file name> root@cpName:destinationAddress

but the problem is that it do not it automatically. it means when it is connecting to the destination computer, it ask me a "yes/no" question and after that it request the root password.
now i want know that how can i answer these questions by writing scripts

Regards,
M.Shirzadi

It should only ask the yes/no the first time.

1. Suppose the domain name of your server is server, and your login name loginname.

2. On the client, generate a public and private key.
ssh-keygen -C loginname@server -t dsa

When asked for a password, simply press return. The private key is stored in ~/.ssh/id_dsa, and the public key in ~/.ssh/id_dsa.pub.

Never give the private key away!

3. Copy the public file to the server with
scp ~/.ssh/id_dsa.pub loginname@server:~/

4. Login on the server with
ssh loginname@server

append the copied file to ~/.ssh/authorized_keys with

cat ~/id_dsa.pub >>~/.ssh/authorized_keys

5. If you want to enable this features on other servers, just repeat step 3 on each of the servers.
That’s it! If you have done everything correctly, the next time you login via SSH or use CVS over SSH, you will not need to enter a password yet you have a secure connenction.

One thing is to write a shell script that will take input until the end of input is reached. use the << !! shell parameters on the line to tell it to receive input from the script until you reach the !!. So if I wanted to supply input I would write a shell such as
scp <FILENAME> User@remotehost << !!
yes
Username
Password
!!
But if you want to do this multiple times then setup the server side so you can login using a public/private keys without being prompted to do so.

thanks for your attention
my friend IKON.
i do your suggestion but i couldn't login to my client.means it again ask me password, also i restart my ssh on client,but it doesn't change.
what's your idea. what is my problem.
thanks

I just ran the exact instructions on my new servers, CentOS 5.2 I installed today and it worked perfectly.