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document/reference/docker.md
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document/reference/docker.md
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# Docker笔记
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## Docker 镜像常用命令
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### 搜索镜像
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docker search java
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### 下载镜像
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docker pull java:8
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docker pull macro/eureka-server:0.0.1
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### 列出镜像
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docker images
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### 删除镜像
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docker rmi java
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docker rmi -f java
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docker rmi -f $(docker images)
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## Docker 容器常用命令
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### 新建并启动容器
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docker run -d -p 91:80 nginx
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### 列出容器
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docker ps
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### 停止容器
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docker stop $ContainerId
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### 强制停止容器
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docker kill $ContainerId
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### 启动已停止的容器
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docker start $ContainerId
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### 进入容器
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docker inspect --format "{{.State.Pid}}" $ContainerId
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nsenter --target "$pid" --mount --uts --ipc --net --pid
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### 删除容器
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docker rm $ContainerId
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docker rm -f $(docker ps -a -q)
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## Docker Registry
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### Docker Registry 2.0搭建
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docker run -d -p 5000:5000 --restart=always --name registry2 registry:2
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### 推送到私有仓库
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docker push localhost:5000/macro/eureka-server:0.0.1
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### 修改镜像标签
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docker tag macro/eureka-server:0.0.1 localhost:5000/macro/eureka-server:0.0.1
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## 使用maven构建Docker镜像
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### 构建镜像
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- command:mvn clean package docker:build
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- tip:
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Linux服务器需要开启远程api:vi /usr/lib/systemd/system/docker.service
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修改为:ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock
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### 推送镜像到私有仓库
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- command:mvn clean package docker:build -DpushImage
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- tip:
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pom.xml修改<imageName>192.168.1.71:5000/macro/${project.artifactId}:${project.version}</imageName>
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- tip:
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docker要支持http:echo '{ "insecure-registries":["192.168.1.71:5000"] }' > /etc/docker/daemon.json
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### 修改Docker镜像存放位置
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1. 查看Docker的存放位置:docker info | grep "Docker Root Dir"(默认为/var/lib/docker)
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2. 关闭Docker服务:systemctl stop docker
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3. 移动目录到目标路径:mv /var/lib/docker /root/data/docker
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4. 建立软连接:ln -s /root/data/docker /var/lib/docker
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## Docker compose
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### 安装
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1. 下载地址:https://github.com/docker/compose/releases
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2. 安装地址:/usr/local/bin/docker-compose
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3. 设置为可执行:sudo chmod +x /usr/local/bin/docker-compose
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4. 测试是否安装成功:docker-compose --version
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### 安装命令补全工具
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sudo curl -L https://raw.githubusercontent.com/docker/compose/1.22.0/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose
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### 常用命令
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- 构建、创建、启动相关容器:docker-compose up
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- 列出所有容器:docker-compose ps
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- 删除指定服务的容器:docker-compose rm eureka
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- 对容器进行动态扩容:docker-compose scale eureka=3
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- 停止相关容器:docker-compose stop eureka
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- 启动相关容器:docker-compose start eureka
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### 编排SpringCloud微服务
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#### 所使用到的工程
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- eureka-server
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- hello-service
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- feign-consumer
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- api-gateway
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#### 编排模式
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1. 编排SpringCloud微服务:见eureka-server/docker-res/docker-compose.yml
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2. 简化SpringCloud微服务编排:见eureka-server/docker-res/docker-compose-simple.yml
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3. 编排高可用的注册中心:见eureka-server/docker-res/docker-compose-eureka.yml
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document/reference/linux.md
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document/reference/linux.md
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# Linux常用命令
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## 系统服务管理
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### systemctl
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- 启动服务:systemctl start httpd.service
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- 关闭服务:systemctl stop httpd.service
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- 重启服务(不管是否在运行):systemctl restart httpd.service
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- 重新载入配置(不中断服务):systemctl reload httpd.service
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- 查看运行状态:systemctl status httpd.service
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- 设置开机启动:systemctl enable httpd.service
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- 禁止开机启动:systemctl disable httpd.service
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## 文件管理
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### ls
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- 列出/home目录下的子目录:ls -l /home
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### pwd
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显示当前工作目录
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### cd
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切换目录: cd /usr/local
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### date
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以指定格式显示日期;date '+date:%x time:%X'
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### passwd
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修改root密码:passwd root
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### su
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普通用户切换到超级用户:su -
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### clear
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清除屏幕信息
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### man
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查看ls命令的帮助信息:man ls
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### who
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- 查看当前运行级别:who -r
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- 显示用的登录详情:who -buT
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### free
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以MB显示内存使用状态:free -m
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### ps
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查看系统所有进程:ps -ef
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查看运行的java进程: ps -ef | grep java
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### top
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查看系统当前活跃进程信息
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### mkdir
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创建目录
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### more
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分页查看
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每10行显示一屏查看:more -c -10
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### cat
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查看config文件:cat -Ab config
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### rm
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- 删除文件:rm a.txt
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- 删除文件夹: rm -rf a/
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### touch
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创建一个文件:touch a.txt
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### cp
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将目录a的文件拷贝到目录b: cp -r /home/a /home/b
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### mv
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移动或覆盖文件:mv a.txt b.txt
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## 压缩与解压
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### tar
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- 打包文件夹到单独的文件:tar -cvf /opt/etc.tar /etc
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- 压缩文件夹到压缩文件(gzip):tar -zcvf /opt/etc.tar.gz /etc
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- 压缩文件夹到压缩文件(bzip2):tar -jcvf /opt/etc.tar.bz2 /etc
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- 查阅压缩包中内容(gzip):tar -ztvf /opt/etc.tar.gz /etc
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- 解压文件到当前目录(gzip):tar -zxvf /opt/etc.tar.gz
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## 磁盘和网络管理
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### df
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查看磁盘占用情况:df -hT
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### ifconfig
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查看当前网络接口状态
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### netstat
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- 查看路由信息:netstat -rn
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- 查看所有有效TCP连接:netstat -an
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- 查看系统中启动的监听服务:netstat -tulnp
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- 查看处于连接状态的系统资源信息:netstat -atunp
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### wget
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从网络上下载软件
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## 软件的安装与管理
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### rpm
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- 安装软件包:rpm -ivh nginx-1.12.2-2.el7.x86_64.rpm
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- 模糊搜索软件包:rpm -qa | grep nginx
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- 精确查找软件包:rpm -qa nginx
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- 查询软件包的安装路径:rpm -ql nginx-1.12.2-2.el7.x86_64
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- 查看软件包的概要信息:rpm -qi nginx-1.12.2-2.el7.x86_64
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- 验证软件包内容和安装文件是否一致:rpm -V nginx-1.12.2-2.el7.x86_64
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- 更新软件包:rpm -Uvh nginx-1.12.2-2.el7.x86_64
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- 删除软件包:rpm -e nginx-1.12.2-2.el7.x86_64
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### yum
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- 安装软件包: yum install nginx
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- 检查可以更新的软件包:yum check-update
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- 更新指定的软件包:yum update nginx
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- 在资源库中查找软件包信息:yum info nginx*
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- 列出已经安装的所有软件包:yum info installed
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- 列出软件包名称:yum list redis*
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- 模糊搜索软件包:yum search redis
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## 网络安全
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### iptables
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- 开启防火墙:systemctl start iptables.service
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- 关闭防火墙:systemctl stop iptables.service
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- 查看防火墙状态:systemctl status iptables.service
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- 设置开机启动:systemctl enable iptables.service
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- 禁用开机启动:systemctl disable iptables.service
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- 查看filter表的链信息:iptables -L -n
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- 查看NAT表的链信息:iptables -t nat -L -n
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- 清除防火墙所有规则:iptables -F;iptables -X;iptables -Z;
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- 添加过滤规则(开发80端口):iptables -I INPUT -p tcp --dport 80 -j ACCEPT
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- 查找规则所做行号:iptables -L INPUT --line-numbers -n
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- 根据行号删除过滤规则:iptables -D INPUT 1
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