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shell script ssh to multiple servers

Hey all, I'm new to shell scripting and kinda struck here with some of the commands

Code:

#!/usr/bin/expect



spawn ssh dmin@host

expect "password"

send "mypassword\n"

send "command1\n"

send "command2\n"

Interact

I write this simple code for 1 remote host and its working fine

Code:

#!/usr/bin/expect



for host in $(cat SERVERS);

do

spawn ssh dmin@host

expect "password"

send "mypassword\n"

send "command1\n"

send "command2\n"

Interact

EOF

done

However I want to execute the same command to over 20 hosts. Im having some trouble with the it. Is there any recommendation? If I want to use cat function and for loop is this possible and if yes how should I write it? I receive error: "cant' read "(cat hosts)"; no such variable

**btw Im using cygwin terminal to execute the script

Hi,

there are already a number of tools for sshing to and running the same command on multiple hosts. Have a look, for example at, clusterssh, mussh, pssh, taktuk etc.

Also, you should probably be using rsa public/private key authentication instead of entering a password for each host (searching for ssh-keygen and ssh-copy-id should provide a huge number of howtos on this topic).

Cheers,

Evo2.