使用expect批量自动登录服务器并执行命令

#!/bin/bash
cat iplist|while read line  #iplist文件中存放了IP地址和密码，每行格式为“IP地址 密码”
do
a=($line)                   #a为数组
/usr/bin/expect<<EOF       
spawn ssh root@${a[0]}     
expect {
"*yes/no" { send "yes\r"; exp_continue}
"*password:" { send "${a[1]}\r" } 
}
expect "#"
send "hostname\r"           
send "exit\r"            
expect eof
EOF
done