Shell Programming and Scripting

I have several clients (over 120) connected to my server. I want to push some patch to all the client using a script which copies the file from the server to a specific path on the client and then installs it.

But for installation of the patch, it needs to be done thorough root login on client. Root password for all clients is 123456

How do I pass the password through the script.

can you give some examples, screenshots or desired input/output?

Using this function, I tar the file modules-2.6.20.1.tar on all Clients one by one. But everytime I need to enter the root password(123456) when script connects to clients one by one.
For e.g program is excuted on C1, then it connects to C2, I need to enter the password after which it is copied to C2...similarily for rest of the clients.

findClients
for Client in $Clients; do
echo -n "$Client " >t
ssh root@$Client "tar -xvf /lib/modules/2.6.20.1/modules-2.6.20.1.tar"
2.6.20.1.tar"> h.txt
done

storing your plain text password in a shell script is a very bad idea

Agreed...but manually entering '123456' for 150 time is even more bad idea...Password has been given jst because system needs a password else, no security was required on these clients.

Pl. help

Sudo or ssh with keyless

how about setting SSH keys between the hosts?