作用：
1. 可以在执行脚本过程中免输入yes
2.可以在执行脚本过程中免输入密码
脚本内容如下：
*** ipfile.txt 为主机列表
[root@YZSJHL-N1-1 opt]# cat remote.sh
#!/usr/bin/expect -f
#chmod 777 distribute_file.sh
password=xxxxxx
path=$1
topath=$2
while read -r ipline
do
expect<<-END
#spawn scp -qpr $path root@${ipline}:${topath}
spawn ssh root@${ipline} "sh /opt/opmysql.sh"
expect {
"(yes/no)?" {send "yes\r"; exp_continue}
"${ipline}'s password:" {send "${password}\r"}
"Permission denied" { send_user "[exec echo "\nError: Password is wrong\n"]"; exit}
}
expect eof
exit
END
done < ipfile.txt