说假设有一个1000台节点的Hadoop集群，要配置节点之间的SSH免密码登录，该如何用shell脚本实现？

#!/bin/expect

#循环1000台机器的IP地址，生成密钥文件authorized_keys

for ip in {cat ip.list}

do

ssh user@$ip ssh-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 ];
    then

touch ~/.ssh/authorized_keys
    fi

ssh user@$ip cat ~/.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 文件到各台机器上面。

for ip 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

转载自：https://www.cnblogs.com/vovlie/archive/2012/09/16/2688020.html

原文：https://www.cnblogs.com/xibuhaohao/p/11570871.html