Common Docker Commands you must know
Tags: docker, linux, tutorial, devops
Published: 2020-05-24 16:34:35

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<p class="graf graf--p">Hi, I will share some easy and common docker commands that will help you In managing Docker data in your system. These commands are the ones that are used daily. I will not mention all Commands, just the basic ones that I use mostly. So let us see.</p>

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<h3 class="graf graf--h3">Cleanup Docker Commands</h3>
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 	<li class="graf graf--li">Image Prune</li>
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<p class="graf graf--p">It will clear all dangling images.</p>

<pre class="graf graf--pre">sudo docker image prune</pre>
<p class="graf graf--p">2. Volume prune</p>
<p class="graf graf--p">It will remove all volumes which are not in use.</p>

<pre class="graf graf--pre">sudo docker volume prune</pre>
<p class="graf graf--p">3. Network Prune</p>
<p class="graf graf--p">Will remove all Networks not in use or leftover from old configurations.</p>

<pre class="graf graf--pre">sudo docker network prune</pre>
<p class="graf graf--p">4. System Prune</p>
<p class="graf graf--p">Will remove all stopped containers along with the network, volume, and dangling images.</p>

<pre class="graf graf--pre">sudo docker system prune</pre>
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<h3><span style="text-transform: inherit;">Information Docker Commands</span></h3>
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<p class="graf graf--p">1. Stats</p>
<p class="graf graf--p">To check stats like Cpu Usage, memory, network and I/O usage of the containers.</p>

<pre class="graf graf--pre">sudo docker stats</pre>
<p class="graf graf--p">2. Inspect</p>
<p class="graf graf--p">To get information about a docker container, like layer images, network, storage, and more.</p>

<pre class="graf graf--pre">sudo docker inspect container_id</pre>
<p class="graf graf--p">3. Logs</p>
<p class="graf graf--p">To check logs of the running Containers</p>

<pre class="graf graf--pre">sudo docker logs container_id</pre>
<p class="graf graf--p">4. PS (Running containers or stopped containers)</p>
<p class="graf graf--p">To check the running containers, and also Stopped containers with additional flags.</p>

<pre class="graf graf--pre">// for only running containers&lt;br&gt;sudo docker ps&lt;br&gt;&lt;br&gt;</pre>
<pre class="graf graf--pre">// for running as well stopped containers&lt;br&gt;sudo docker ps -a</pre>
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<h3 class="graf graf--h3">Execution and running-related Docker Commands</h3>
<p class="graf graf--p">1. EXEC (to drop to docker shell of the running container)</p>
<p class="graf graf--p">It helps to drop to the shell of the docker container running, so you can execute commands for the specific container, inside the container. You just need to pass the correct shell used by docker container</p>

<pre class="graf graf--pre">sudo docker exec -it container_id bash</pre>
<pre class="graf graf--pre">sudo docker exec -it container_id sh</pre>
<p class="graf graf--p">2. Pull</p>
<p class="graf graf--p">Used to pull docker images from the container registry or your hosted registry.</p>

<pre class="graf graf--pre">sudo docker pull image_name</pre>
<pre class="graf graf--pre">sudo docker pull repo_name/image_name</pre>
<p class="graf graf--p">3. Run</p>
<p class="graf graf--p">To run a docker container using an image you just pulled above. Additional parameters can be provided</p>

<pre class="graf graf--pre">sudo docker run image_name</pre>
<p class="graf graf--p">4. Start</p>
<p class="graf graf--p">To run a stopped container</p>

<pre class="graf graf--pre">sudo docker start container_id</pre>
<p class="graf graf--p">5. Stop</p>
<p class="graf graf--p">To stop a running container</p>

<pre class="graf graf--pre">sudo docker stop container_id</pre>
<p class="graf graf--p">6. Restart</p>
<p class="graf graf--p">To restart a running container</p>

<pre class="graf graf--pre">sudo docker restart container_id</pre>
<p class="graf graf--p">These are the common ones, but to check all, commands type below command</p>

<pre class="graf graf--pre">sudo docker --help</pre>
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<pre class="prettyprint lang-sh" data-start-line="1" data-visibility="visible" data-highlight="" data-caption="">balvinder@balvinder-Inspiron-5575:~$ sudo docker --help

Usage:	docker [OPTIONS] COMMAND

A self-sufficient runtime for containers

Options:
      --config string      Location of client config files (default "/root/.docker")
  -c, --context string     Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default context set with "docker context use")
  -D, --debug              Enable debug mode
  -H, --host list          Daemon socket(s) to connect to
  -l, --log-level string   Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info")
      --tls                Use TLS; implied by --tlsverify
      --tlscacert string   Trust certs signed only by this CA (default "/root/.docker/ca.pem")
      --tlscert string     Path to TLS certificate file (default "/root/.docker/cert.pem")
      --tlskey string      Path to TLS key file (default "/root/.docker/key.pem")
      --tlsverify          Use TLS and verify the remote
  -v, --version            Print version information and quit

Management Commands:
  builder     Manage builds
  config      Manage Docker configs
  container   Manage containers
  context     Manage contexts
  engine      Manage the docker engine
  image       Manage images
  network     Manage networks
  node        Manage Swarm nodes
  plugin      Manage plugins
  secret      Manage Docker secrets
  service     Manage services
  stack       Manage Docker stacks
  swarm       Manage Swarm
  system      Manage Docker
  trust       Manage trust on Docker images
  volume      Manage volumes

Commands:
  attach      Attach local standard input, output, and error streams to a running container
  build       Build an image from a Dockerfile
  commit      Create a new image from a container's changes
  cp          Copy files/folders between a container and the local filesystem
  create      Create a new container
  diff        Inspect changes to files or directories on a container's filesystem
  events      Get real time events from the server
  exec        Run a command in a running container
  export      Export a container's filesystem as a tar archive
  history     Show the history of an image
  images      List images
  import      Import the contents from a tarball to create a filesystem image
  info        Display system-wide information
  inspect     Return low-level information on Docker objects
  kill        Kill one or more running containers
  load        Load an image from a tar archive or STDIN
  login       Log in to a Docker registry
  logout      Log out from a Docker registry
  logs        Fetch the logs of a container
  pause       Pause all processes within one or more containers
  port        List port mappings or a specific mapping for the container
  ps          List containers
  pull        Pull an image or a repository from a registry
  push        Push an image or a repository to a registry
  rename      Rename a container
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Remove one or more images
  run         Run a command in a new container
  save        Save one or more images to a tar archive (streamed to STDOUT by default)
  search      Search the Docker Hub for images
  start       Start one or more stopped containers
  stats       Display a live stream of container(s) resource usage statistics
  stop        Stop one or more running containers
  tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
  top         Display the running processes of a container
  unpause     Unpause all processes within one or more containers
  update      Update configuration of one or more containers
  version     Show the Docker version information
  wait        Block until one or more containers stop, then print their exit codes

Run 'docker COMMAND --help' for more information on a command.</pre>
You can also check the official documentation here. <a href="https://docs.docker.com/">https://docs.docker.com/</a>


Thanks for reading the article, I hope it will Surely do help. Do let me know in the comments below. 

<blockquote>Originally published at <a href="https://tekraze.com/2020/05/common-docker-commands-you-must-know/"> Tekraze.com</a></blockquote>