Remove blank lines after code block markers

03_install/3.6_offline.md

@@ -26,7 +26,6 @@ sudo sed -i 's+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc
 
 yum update
 ```
-
 ```bash
 sudo yum list docker-ce --showduplicates|sort -r
 
@@ -42,13 +41,11 @@ docker-ce.x86_64            3:19.03.2-3.el7                     docker-ce-stable
 docker-ce.x86_64            3:19.03.1-3.el7                     docker-ce-stable
 ....
 ```
-
 ##### 下载到指定文件夹
 
 ```bash
 sudo yum install --downloadonly --downloaddir=/tmp/docker24_offline_install/ docker-ce-24.0.4-1.el7 docker-ce-cli-24.0.4-1.el7
 ```
-
 ```bash
 Dependencies Resolved
 
@@ -77,7 +74,6 @@ Background downloading packages, then exiting:
 Total                                                                                                                                               118 MB/s |  87 MB  00:00:00
 exiting because "Download Only" specified
 ```
-
 ##### 复制到目标服务器之后进入文件夹安装：C-N
 
 * 离线安装时，必须使用 rpm 命令不检查依赖的方式安装
@@ -85,7 +81,6 @@ exiting because "Download Only" specified
 ```bash
 rpm -Uvh *.rpm --nodeps --force
 ```
-
 ##### 锁定软件版本：C-N
 
 **下载锁定版本软件**
@@ -95,25 +90,21 @@ rpm -Uvh *.rpm --nodeps --force
 ```bash
 sudo yum install yum-plugin-versionlock
 ```
-
 **锁定软件版本**
 
 ```bash
 sudo yum versionlock add docker
 ```
-
 **查看锁定列表**
 
 ```bash
 sudo yum versionlock list
 ```
-
 ```bash
 Loaded plugins: fastestmirror, versionlock
 3:docker-ce-24.0.4-1.el7.*
 versionlock list done
 ```
-
 **锁定后无法再更新**
 
 ```bash
@@ -124,31 +115,26 @@ Excluding 1 update due to versionlock (use "yum versionlock status" to show it)
 Package 3:docker-ce-24.0.4-1.el7.x86_64 already installed and latest version
 Nothing to do
 ```
-
 **解锁指定软件**
 
 ```bash
 sudo yum versionlock delete docker-ce
 ```
-
 ```bash
 Loaded plugins: fastestmirror, versionlock
 Deleting versionlock for: 3:docker-ce-24.0.4-1.el7.*
 versionlock deleted: 1
 ```
-
 **解锁所有软件**
 
 ```bash
 sudo yum versionlock delete all
 ```
-
 #### YUM 本地源服务器搭建安装 Docker
 
 ##### 挂载 ISO 镜像搭建本地 File 源
 
 ```bash
-
 ## 删除其他网络源
 
 rm -f /etc/yum.repos.d/*
@@ -157,9 +143,7 @@ rm -f /etc/yum.repos.d/*
 
 mount /dev/cdrom /mnt
 ```
-
 ```bash
-
 ## 添加本地源
 
 cat >/etc/yum.repos.d/local_files.repo<< EOF
@@ -171,19 +155,15 @@ gpgcheck=0
 gpgkey=file:///mnt/RPM-GPG-KEY-CentOS-7
 EOF
 ```
-
 ```bash
-
 ## 测试刚才的本地源,安装createrepo软件
 
 yum clean all 
 yum install createrepo -y
 ```
-
 ##### 根据本地文件搭建 BASE 网络源
 
 ```bash
-
 ## 安装apache 服务器
 
 yum install httpd -y
@@ -203,21 +183,17 @@ createrepo  /var/www/html/base/
 systemctl enable httpd
 systemctl start httpd
 ```
-
 ##### 下载 Docker-CE 镜像仓库
 
 在有网络的服务器上下载 Docker-ce 镜像
 
 ```bash
-
 ## 下载清华的镜像源文件
 
 wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo
 sudo sed -i 's+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc/yum.repos.d/docker-ce.repo
 ```
-
 ```bash
-
 ## 新建 docker-ce目录
 
 mkdir /tmp/docker-ce/
@@ -226,20 +202,17 @@ mkdir /tmp/docker-ce/
 
 reposync -r docker-ce-stable -p /tmp/docker-ce/
 ```
-
 ##### 创建仓库索引
 
 把下载的 docker-ce 文件夹复制到离线的服务器
 
 ```bash
-
 ## 把docker-ce 文件夹复制到/var/www/html/docker-ce
 
 ## 重建索引
 
 createrepo  /var/www/html/docker-ce/
 ```
-
 ##### YUM 客户端设置：C...N
 
 ```bash
@@ -266,7 +239,6 @@ proxy=_none_
 EOF
 
 ```
-
 ##### Docker 安装：C...N
 
 ```bash