shell脚本批量推公钥及修改随机密码

#!/bin/bash
rpm -q expect &>/dev/null
if [ $? -ne 0 ];then 
    yum -y install expect &>/dev/null
fi
#判断公钥是否存在
if [ ! -f ~/.ssh/id_rsa ];then
    ssh-keygen -P "" -f ~/.ssh/id_rsa
fi
echo "请先定义好IP地址池在当前目录的ip.txt"
sleep 2
#推公钥
for ip1 in `cat /root/ip.txt`
do
password="656768" #定义对方的密码 
/usr/bin/expect -c "   
  set timeout 5
        spawn ssh-copy-id root@$ip1
        expect {
         \"*(yes/no)\" { send \"yes\r\";exp_continue }
        \"*password\" { send \"$password\r\"; exp_continue }
        }     
expect eof"
done
#修改密码
> newpass.txt
> failip.txt
for ip in `cat /root/ip.txt`
do
math=`date +%N`
math2=`echo ${math:1:8}`
remote_cmd="echo $math2 | passwd --stdin root"
  ssh root@$ip $remote_cmd
  if [ $? != 0 ];then
        echo "$ip连接失败 请手动检查！" >> failip.txt
        else
  echo " 密码：($math2) ip地址：$ip  " >> newpass.txt
  fi 
done
cat newpass.txt
cat failip.txt