Docker common commands include commands for creating and managing containers (docker run, start, stop, restart, rm), commands for managing images (docker build, push, pull, rmi), Commands for viewing and diagnosis (docker ps, logs, top, exec, inspect), and commands for network management (docker network create, connect, disconnect), etc.
Docker Common Commands
Docker is a lightweight containerization platform for packaging and distributing applications program. In order to use Docker effectively, it is important to understand its common commands.
Create and manage containers
- docker run: Create and run a container.
- docker start: Start a stopped container.
- docker stop: Stop a running container.
- docker restart: Restart a container.
- docker rm: Delete a container.
Manage images
- docker build: Build an image from a Dockerfile.
- docker push: Push the image to the Docker image warehouse.
- docker pull: Pull the image from the Docker image warehouse.
- docker rmi: Delete an image.
View and Diagnose
- docker ps: List running containers.
- docker logs: View the container’s logs.
- docker top: View the processes running in the container.
- docker exec: Execute commands in the container.
- docker inspect: View the detailed configuration of the container.
Network management
- docker network create: Create a network.
- docker network connect: Connect the container to the network.
- docker network disconnect: Disconnect the container from the network.
Others
- docker version: Check the Docker version.
- docker info: View Docker host information.
- docker help: Get help for the command.
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docker中rm和rmi的区别:rm命令用于删除一个或者多个容器,而rmi命令用于删除一个或者多个镜像;rm命令的语法为“docker rm [OPTIONS] CONTAINER [CONTAINER...]”,rmi命令的语法为“docker rmi [OPTIONS] IMAGE [IMAGE...]”。

docker官方镜像有:1、nginx,一个高性能的HTTP和反向代理服务;2、alpine,一个面向安全应用的轻量级Linux发行版;3、busybox,一个集成了三百多个常用Linux命令和工具的软件;4、ubuntu;5、PHP等等。

docker对于小型企业、个人、教育和非商业开源项目来说是免费的;2021年8月31日,docker宣布“Docker Desktop”将转变“Docker Personal”,将只免费提供给小型企业、个人、教育和非商业开源项目使用,对于其他用例则需要付费订阅。

docker容器重启后数据会丢失的;但是可以利用volume或者“data container”来实现数据持久化,在容器关闭之后可以利用“-v”或者“–volumes-from”重新使用以前的数据,docker也可挂载宿主机磁盘目录,用来永久存储数据。

AUFS是docker最早支持的存储引擎。AUFS是一种Union File System,是文件级的存储驱动,是Docker早期用的存储驱动,是Docker18.06版本之前,Ubuntu14.04版本前推荐的,支持xfs、ext4文件。

docker能安装oracle。安装方法:1、拉取Oracle官方镜像,可以利用“docker images”查看镜像;2、启动容器后利用“docker exec -it oracle11g bash”进入容器,并且编辑环境变量;3、利用“sqlplus /nolog”进入oracle命令行即可。

解决方法:1、停止docker服务后,利用“rsync -avz /var/lib/docker 大磁盘目录/docker/lib/”将docker迁移到大容量磁盘中;2、编辑“/etc/docker/daemon.json”添加指定参数,将docker的目录迁移绑定;3、重载和重启docker服务即可。

docker中的镜像会自动更新;可以利用Watchtower工具来自动更新镜像,Watchtower是一个可以监控正在运行的容器镜像是否更新的工具,当本地镜像与远程镜像有差异的时候,可以自动使用当前容器的运行参数以新镜像重新创建一个新的容器,并删除旧的容器。


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