使用shell腳本實現自動SSH互信功能

原文:http://www.cnblogs.com/vovlie/archive/2012/09/16/2688020.html

說假設有一個1000臺節點的Hadoop集羣，要配置節點之間的SSH免密碼登錄，該如何用shell腳本實現？

#!/bin/expect

#循環1000臺機器的IP地址，生成密鑰文件authorized_keys

forip in {cat ip.list}

do

ssh user@$ipssh-keygen -t rsa  &>/dev/null

expect{

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

"password:"{send"$passwd\r";exp_continue}

}

cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys &> /dev/null  

exit

if[ !-f ~/.ssh/authorized_keys ];<br>    then

touch ~/.ssh/authorized_keys<br>    fi

ssh user@$ipcat ~/.ssh/authorized_keys >> ~/.ssh/authorized_keys  &> /dev/null

expect{

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

"password:"{send"$passwd\r";exp_continue}

}  

done

#scp authorized_keys 文件到各臺機器上面。

forip in {cat ip.list}

do

scp ~/.ssh/authorized_keys user@$ip:~/.ssh/

expect{

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

"password:"{send"$passwd\r";exp_continue}

}  

done