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 ];<br> then touch ~/.ssh/authorized_keys<br> 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
