第三周

1. yum私有仓库的实现及博客输出

1. yum -y install httpd

   systemctl start httpd

   dnf reposync --repoid=epel --download-metadata -p /var/www/html

   

   2.画图 TCP协议和三次握手及四次挥手

   

    

   

    

   

    

   3. 静态配置网卡IP，centos/ubuntu实现 

   vi /etc/sysconfig/network-scripts/ifcfg-eth0
   
   DEVICE=eth0
   NAME=eth0
   BOOTPROTO=static
   IPADDR=10.0.0.7
   PREFIX=24
   GATEWAY=10.0.0.7
   DNS1=10.0.0.2
   DNS2=180.76.76.76
   ONBOOT=yes
   
   #保存
   nmcli connection reload
   nmcli connection up eth0

   4.实现免密登陆脚本

   
   #!/bin//bash
   PS3="请选择你需要的操作:(1-4)"
   HOST=243
   yellow () {
   RES_COL=60
   MOVE_TO_COL="echo -en \\033[${RES_COL}G"
   SETCOLOR_SUCCESS="echo -en \\033[1;32m"
   SETCOLOR_FAILURE="echo -en \\033[1;31m"
   SETCOLOR_WARNING="echo -en \\033[1;33m"
   SETCOLOR_NORMAL="echo -en \e[0m"
   echo -n "$1" && $MOVE_TO_COL
   echo -n "["
   if [ $2 = "success" -o $2 = "0" ];then
   ${SETCOLOR_SUCCESS}
   echo -n $" OK "
   elif [ $2 = "failure" -o $2 = "1" ];then
   ${SETCOLOR_FAILURE}
   echo -n $"FAILED"
   else
   ${SETCOLOR_WARNING}
   echo $"WARNING"
   fi
   ${SETCOLOR_NORMAL}
   echo -n "]"
   echo
   }
   touch_public () {
   ssh-keygen -t rsa -P "" -f ~/.ssh/id_rsa > /dev/null
   }
   yum_apache () {
   yum -y install apache
   }
   yum_mysql () {
   yum -y install mariadb-server
   }
   ssh_host () {
   ssh 192.168.230.${HOST}
   }
   rpm -q expect &> /dev/null || yum -y install expect &> /dev/null
   touch_public
   expect << EOF
   spawn ssh-copy-id 192.168.230.${HOST}
   expect {
   "yes/no" { send "yes\n";exp_continue }
   "password:" { send "123\n" }
   }
   expect eof
   EOF
   
   ssh_host () {
   ssh 192.168.230.${HOST}
   }
   select service in 安装mysql 安装apache 免密钥登入主机 退出选择; do
   case $REPLY in
   1)
   yum_mysql
   color mysql 0
   ;;
   2)
   yum_apache
   color apache 0
   ;;
   3)
   ssh_host
   color 免密登入 0
   ;;
   4)
   echo "成功退出"
   break
   ;;
   *)
   echo "未知选择，请重新选择"
   ;;
   esac
   done