Bash script to push ssh_keys - linux

Question

I'm trying to read a file with the names of approx 500 server names on their own individual lines, and then for each of those, ssh in and append the roots authorized_keys file for each. I keep getting errors each time I run the script and/or modify it. Can you please help me figure out what's wrong? My OS is Mac OS X:
#!/usr/bin/expect
set timeout 60
set SERVERS "cat /Users/macuser/server.lst"
set USER "myuser"
set MY_PASS "mypasswordhere"
for EACH in $SERVERS; do
cat /Users/macuser/.ssh/id_rsa.pub | ssh $USER#$EACH "tee -a .ssh/authorized_keys"
expect {
eof {break}
"The authenticity of host" {send "yes\r"}
"password:" {send "$MY_PASS\r"}
}
interact
done
here is the error:
wrong # args: should be "for start test next command"
while executing
"for EACH in $SERVERS"
(file "./keyssh_push.sh" line 7)

Answer 1

From Use expect in bash script to provide password to SSH command, sshpass looks like the easiest way to do this. I would do:
#!/bin/sh
servers=`cat /Users/macuser/server.lst`
user="myuser"
my_pass="mypasswordhere"
for server in $servers
do
</Users/macuser/.ssh/id_rsa.pub sshpass -p"$my_pass" \
ssh -o StrictHostKeyChecking=no $user#$server cat '>>.ssh/authorized_keys'
done
Update
With #alvits's suggestion:
#!/bin/sh
servers=`cat /Users/macuser/server.lst`
user="myuser"
my_pass="mypasswordhere"
for server in $servers
do
sshpass -p"$my_pass" ssh-copy-id -o StrictHostKeyChecking=no \
-i /Users/macuser/.ssh/id_rsa $user#$server
done