Shell Programming and Scripting

Hi!

I'm trying to copy a set of files from server1 to server2. I'm doing this from server3. Using the sshpass functionality, can I accomplish this?

This is what I have so far, but this doesn't work:

Code:

user@server3#~ sshpass -p 'password' scp user1@server1:/path/from/* user1@server2:/path/to/

Obviously, the 'password' is same for user1@server1 and user1@server2.

Thanks for your help in advance!

You can:

You do realize that your password is visible to the entire system when you do this, yes?

ssh makes it a pain to pass around password because doing so is a really bad idea.

I have a regular copy I do between servers. So I just set up a public/private key pair to do the job. On one computer, I did:

Code:

ssh-keygen -t rsa

Then I copied the public key to the other computer:

Code:

ssh-copy-id -i ~/.ssh/id_rsa.pub remoteuser@remote_host

Now when I ssh from the local computer on a specific user account to the remote computer with a specific user account, it no longer prompts for a password for ssh.

Then I can just do stuff like this:

Code:

scp remoteuser@remote_host:/home/remoteuser/somesortof.log /home/localuser/somesortof.log

In this command line, I'm copying from the second computer to the first computer (where I created the pub/pvt key pair).

The nice thing here is no 3rd computer needed. And no passwords being passed or exposed.

Sorry for the late reply!

Corona688: No, I don't type the password in the script, rather I request the user to type the password, read it as a variable and use that in the sshpass -p "$pwd"

DGPickett: I don't understand this, can you show an example?

//use the ssh cat twice to copy files through your host, or//

nbsparks: Thanks, I know about ssh-keygen, there's just too many servers for which I can't just go and do this!

...and it is visible to the entire system when you do so.

Why not just let ssh ask for its own password?

Sorry if this is a stupid question, I'm a novice at this, but how is that visible to the entire system? I'm getting the password one time during the execution of the script. Here's a bit from my script:

Code:

read -s -p "Enter user1's server password: " pwd
sshpass -p "$pwd" user1@server1 somecmd
sshpass -p "$pwd" user1@server2 somecmd

The reason why I'm asking the user to enter the password is because I have multiple lines where I have to login into different servers (with same user, ofcourse), so I don't want the user to enter the password for multiple times.

Do you think reading the password using the above way will still be visible to the entire system?