实验：让多台主机实现基于key验证

#!/bin/bash
#
dir=/root/.ssh
scrfile=$dir/id_rsa
pubfile=$dir/id_rsa.pub
login_password='abcdefg'
localip=172.16.0.11

rpm -q expect &> /dev/null || yum install expect -y &> /dev/null

[ -d $dir ] || mkdir $dir

if [ ! -f $scrfile -o ! -f $pubfile ];then
        ssh-keygen -f $scrfile -P "" &> /dev/null
        expect <<-EOF
        spawn ssh-copy-id -i $pubfile $localip
        expect {
                "yes/no" { send "yes\n";exp_continue }
                "password" { send "$login_password\n" }
        }
        expect eof
        EOF
fi

while read ipaddr;do
        expect <<-EOF
        set timeout 10
        spawn scp -pr $dir $ipaddr:/root/
        expect {
                "yes/no" { send "yes\n";exp_continue }
                "password" { send "$login_password\n" }
        }
        expect eof
        EOF
done < /root/ipaddr.txt