shell实现免密

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#!/bin/bash   createLocalKey () {     rm -rf ~/.ssh/id_rsa     rm -rf ~/.ssh/id_rsa.pub     /usr/bin/expect <<_oo_           spawn ssh-keygen -t rsa         expect {             "*.ssh/id_rsa*" { send "\r";exp_continue }             "*no passphrase*" { send "\r";exp_continue }             "*passphrase again*" { send "\r";exp_continue }             "Overwrite*" { send "y\r";exp_continue }         }         expect eof   _oo_   }     copyToRemote () {     hosts=(master slave1 slave2)     password="root"     for host in ${hosts[@]};     do       /usr/bin/expect <<_oo_           spawn ssh-copy-id $host         expect {             "*connecting (yes/no)*" { send "yes\r";exp_continue }             "*password*" { send "$password\r";exp_continue }         }           expect eof   _oo_     done }     createLocalKey copyToRemote