Now you understand how to list and filter installed packages on CentOS. Introduction Managing a CentOS operating system often means knowing the software packages that are installed. Was this article helpful?
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Next you should read. The yum commands used in this is to use repositories as a package sources and the yum will install software from an individual package file. To use yum for a specific function and for one or more packages or the package groups. Each section below will shows some examples.
Yum always downloads the latest package information from the repositories. If the system uses a slow network connection, then yum may require some time to download the repository and find the indexes and the header files for each package. The yum utility will search for data to determine the best repository and proceeds with the required installation and will show the result to display the transaction for you.
The result may include the installations, updates, or removal of the packages, in order to resolve and install the software dependencies. This installs and runs Docker Engine. Use sudo to run Dockercommands. Continue to Linux postinstall to allownon-privileged users to run Docker commands and for other optional configurationsteps. To upgrade Docker Engine, follow the installation instructions,choosing the new version you want to install.
You need to downloada new file each time you want to upgrade Docker Engine. To install a nightly or test pre-release package,change the word stable in the above URL to nightly or test. Learn about nightly and test channels. Install Docker Engine, changing the path below to the path where you downloadedthe Docker package. Docker is installed but not started. The docker group is created, but nousers are added to the group.
Use sudo to run Docker commands. Continue to Post-installation steps for Linux to allownon-privileged users to run Docker commands and for other optional configurationsteps. To upgrade Docker Engine, download the newer package file and repeat theinstallation procedure, using yum -y upgrade instead of yum -y install , and point to the new file.
Docker provides a convenience script at get. The convenience script is not recommended for production environments, but can beused as an example to create a provisioning script that is tailored to your needs. Also refer to the install using the repositorysteps to learn about installation steps to install using the package repository. The source code for the script is open source, and can be found in the docker-install repository on GitHub. Always examine scripts downloaded from the internet before running them locally.
Before installing, make yourself familiar with potential risks and limitationsof the convenience script:. This example downloads the script from get. Docker is installed. The docker service starts automatically on Debian baseddistributions. As the message indicates, non-root users cannot run Docker commands by default. The installation script requires root or sudo privileges to install anduse Docker.
If you want to grant non-root users access to Docker, refer to thepost-installation steps for Linux. Docker can also be installed without root privileges, or configured to runin rootless mode. Archived versions are not supported or tested. You must enable the centos-extras repository. The Docker CE package is now changed to Docker-ce.
Previously, the package name was Docker.
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