密钥发批量分发脚本

#!/bin/bash
function localYumBuild(){
echo "正在安装本地yum仓库"
umount /dev/sr0 &>/dev/null
 [ -d /media/cdrom ] || mkdir -p /media/cdrom
mount /dev/sr0 /media/cdrom &>/dev/null
 [ $? -eq 0 ] || echo "请插入光盘"
    [ -d /etc/yum.repos.d ] || mkdir -p /etc/yum.repos.d &>/dev/null
    cd /etc/yum.repos.d
    mv * /tmp/
    cat > /etc/yum.repos.d/localyum.repo << EEE
    [local]  
    name=localrepo
    baseurl=file:///media/cdrom/
    gpgcheck=0
    enabled=1
    EEE  
    yum -y clean all &> /dev/null
    yum makecache &> /dev/null
[ $? -eq 0 ] && echo "本地yum 仓库搭建成功" || (echo "本地yum仓库搭建失败" && exit)

  } 

which wget &>/dev/null || yum -y install wget &>/dev/null
localYumBuild
yum -y install wget &>/dev/null || (echo "系统错误" &&exit)
function yunYumBuild(){
echo "正在安装云yum仓库"
cd /etc/yum.repos.d
wget -O /etc/yum.repos.d/epel.repo

http://mirrors.aliyun.com/repo/epel-6.repo &>/dev/null

yum -y clean all &>/dev/null
yum makecache &>/dev/null
[ $? -eq 0 ] && echo "云yum 仓库搭建成功" || (echo "云yum仓库搭建失败" && exit)
    }
    echo "网络连接检查中..."
ping www.baidu.com -c2 &>/dev/null || (echo"无网络连接，无法运行脚本" && exit)
 which sshpass &>/dev/null || yum -y install sshpass &>/dev/null
     if [ $? -ne 0 ];then
 yunYumBuild
  yum -y install sshpass &>/dev/null || ( echo "安装失败" && exit)
 fi
  [ -d ~/.ssh ] || mkdir -p ~/.ssh;chmod 700 ~/.ssh
 echo "正在创建密钥对。。。"
 rm -rf ~/.ssh/id_dsa ~/.ssh/id_dsa.pub
 ssh-keygen -t dsa -f ~/.ssh/id_dsa -P "" &>/dev/null
 for ip in 192.168.200.{1..254}
 do
 ping $ip -c 2 -i 0.1 &>/dev/null
      if [ $? -eq 0 ];then
         echo "$ip 存活"
      sshpass -p "666666" ssh-copy-id -i ~/.ssh/id_dsa.pub "-o StrictHostKeyChecking=no root@$ip" &>/dev/null && echo "密钥分发成功"
     else
            echo "$ip 不存活"
    fi