Method 1 Using Expect

1. install Expect using yum

yum install expect -y

2. create an exp script to call ssh-keygen and generate the key files

vim ssh-keygen.exp

!/usr/bin/expect

set enter "\n"

spawn ssh-keygen -t dsa

expect {

"*(/home/root/.ssh/id_dsa)" {send "\n\r";exp_continue}

"*(empty for no passphrase)" {send "\n\r";exp_continue}

"*again" {send "\n\r"}

}

expect eof

3.create the auto distribute script

vim fenfa_sshkey.sh

!/bin/sh

expect ssh-keygen.exp &>/dev/null

. /etc/init.d/functions

for ip in 100 101 102

do

expect fenfa_sshkey.exp ~/.ssh/id_dsa.pub 192.168.112.$ip >/dev/null 2>&1

expect fenfa_sshkey.exp ~/.ssh/id_dsa.pub 192.168.112.$ip &>/dev/null

if [ $? -eq 0 ];then

action "192.168.112.$ip" /bin/true

else

action "192.168.112.$ip" /bin/false

fi

done

4. create expect script

vim fenfa_sshkey.exp

!/usr/bin/expect

if { $argc != 2 } {

send_user "usage: expect fenfa_sshkey.exp file host\n"

exit

}

define var

set file [lindex $argv 0]

set host [lindex $argv 1]

set password "123456"

spawn scp /etc/hosts [email protected]:/etc/hosts

spawn scp -P52113 $file oldboy@$host:$dir

spawn ssh-copy-id -i $file "-p 52113 oldboy@$host"

spawn ssh-copy-id -i $file "-p 22 lx888@$host"

expect {

"yes/no" {send "yes\r";exp_continue}

"*password" {send "$password\r"}

}

expect eof