II. How To List and Attach to Docker Containers
III. How to Commit Changes and Create Docker Images
IV. How to View Logs for a Docker Container
Docker is a container-based software framework, commonly used for automating deployment of applications. Containers are encapsulated, lightweight, and portable application modules.
Pre-Flight Check
- These instructions are specifically intended for upgrading/updating Docker on Fedora 23. If you’re using an older version of Fedora, check our tutorial for Fedora 22.
- We’ll be logging into a Liquid Web Self Managed Fedora 23 server as root.
Step #1: Upgrade/Update Docker on Fedora 23
To upgrade or update, simply enter:
dnf upgrade -y docker-io
Step #2: Other Docker Commands
Docker already should be started, but if it isn’t you can start it with the following command:
systemctl start docker
Docker also already should be configured to start when the server boots; if not, you can use the following command to do so:
systemctl enable docker
Step #3: Download a Docker Container
To get started using Docker, we’ll download the Fedora Docker image:
docker pull fedora
Step #4: Run a Docker Container
Setting up a basic Fedora container with a bash shell requires a single command, “docker”:
docker run -i -t fedora /bin/bash
Breaking down that command:
- docker run will run a command in a new container
- -i attaches stdin and stdout
- -t allocates a tty
- fedora indicates that we’ll be using the standard fedora container
- /bin/bash provides us with our shell
That’s it! You’re now using a bash shell inside of a Fedora Docker container.
To disconnect, or detach, from the shell without exiting, use the escape sequence: Ctrl + p followed by Ctrl + q.
You can easily search for other community containers. Here, we are searching for the keyword “fedora”:
docker search fedora
Step #5: Get More Out of Docker
Learn more about Docker by reviewing the official documentation.
