scp, how to pass password in script

ebel.velda · 09-14-2006, 03:43 AM

Problem :
I have to transfer a file to many maschines.
I do not want to use key pairs, but scp.
How do I pass the password into the script? I do not mind that password stands in a script, it is OK.
I know about EXPECT, and have made it work, but only for one loop (see below)and I need it to work on 20 maschines....
Help would bne greatly valued!
My scripts :
With EXPECT :
*************************
set nalog username
set lozinka password
set fajl bla-bla
spawn scp -p -v /root/nalog/$fajl $nalog@10.66.3.222:/home/$nalog
expect "$nalog@IP address's password:"
send "$lozinka\r"
interact
**************************
When I try to make another (same definition) process towards another maschine, it does not work any more. So how do I make multiple scp-s with EXPECT (all different IP, username and pass)?

With SCP :
**************************
nalog=username
lozinka=pasword
echo Name of the file to transfer :
echo $fajl
scp -2 -4 -v /root/nalog/$fajl $nalog@IP address:/home/$nalog
*************************
When I try to make the script take the password here (and belive me, I have tried echo, piping, etc) it does not work any more

HELP!!!!
Velda

sirclif · 09-14-2006, 10:34 AM

the obvious attempt would be to try to pipe your password to the standard input of scp

> echo "password" | scp file user@host:/dir/to/copy/to

but this won't work because scp doesn't read from the standard input because is designed not to allow the user to do things like pass the password through standard input.

IBall · 09-14-2006, 09:11 PM

Why don't you want to use key pairs? Apart from being much more secure, SCP is designed to use them for passwordless logins:

Code:

scp -i ~/.ssh/ssh_key localFile user@remoteHost:/path/to/remoteFile

I have some information about setting up SSH public/private key pairs Here

I hope this helps
--Ian

frenchn00b · 07-17-2007, 04:59 PM

Quote:

Originally Posted by IBall

Why don't you want to use key pairs? Apart from being much more secure, SCP is designed to use them for passwordless logins:

Code:

scp -i ~/.ssh/ssh_key localFile user@remoteHost:/path/to/remoteFile

I have some information about setting up SSH public/private key pairs Here

I hope this helps
--Ian

has someone more information, how to quickly use : expect ??
(easy, simple, fast and secured)

jschiwal · 07-17-2007, 05:13 PM

You might want to read up on using ssh-agent and ssh-add for this. The idea is that you just need to supply your password once when you start your session. It is more secure doing this to cache your passphrase, then passwordless logins, in the case that one of the remote servers is compromised or you don't trust the root user on that server.