Chapter 4. Searching for RHEL 8 content In the following sections, learn how to locate and examine content in the AppStream and BaseOS repositories in Red Hat Enterprise Linux 8 by using YUM . 4.1. Searching for software packages To identify which package provides the software you require, you can use YUM to search the repositories. Procedure Depending on your scenario, use one of the following options to search the repository: To search for a term in the name or summary of packages, enter: To search for a term in the name, summary, or description of packages, enter: Note that searching additionally in the description by using the --all option is slower than a normal search operation. 4.2. Listing software packages You can use YUM to display a list of packages and their versions that are available in the repositories. Procedure List the latest versions of all available packages, including architectures, version numbers, and the repository they where installed from: The @ sign in front of a repository indicates that the package in this line is currently installed. Alternatively, to display all available packages, including version numbers and architectures, enter: Optionally, you can filter the output by using other options instead of --all , for example: Use --installed to list only installed packages. Use --available to list all available packages. Use --upgrades to list packages for which newer versions are available. Note You can filter the results by appending global expressions as arguments. For more information, see Specifying global expressions in yum input . 4.3. Listing repositories To get an overview of repositories that are enabled and disabled on your system, you can list them. Procedure List all enabled repositories on your system,: To display only certain repositories, append one of the following options to the command: Append --disabled to list only disabled repositories. Append --all to list both enabled and disabled repositories. Optional: List additional information about the repositories: Note You can filter the results by appending global expressions as arguments. For more information, see Specifying global expressions in yum input . 4.4. Displaying package information You can query YUM repositories to display further details about a package, such as the following: Version Release Architecture Package size Description Procedure Display information about one or more available packages: This command displays the information for the currently installed package and, if available, its newer versions that are in the repository. Note You can filter the results by appending global expressions as arguments. For more information, see Specifying global expressions in yum input . 4.5. Listing package groups and packages they provide Package groups bundle multiple packages, and you can use package groups to install all packages assigned to a group in a single step. However, before the installation, you must identify the name of the required package group. Procedure List both installed and available groups: Note that you can filter the results by appending the --installed and --available option to the yum group list command. By using the --hidden option, you can display hidden groups in the output. List mandatory, optional, and default packages contained in a particular group: Note You can filter the results by appending global expressions as arguments. For more details, see Specifying global expressions in yum input . Optional: View the number of installed and available groups: 4.6. Listing available modules and their contents By searching for modules and displaying information about them with YUM , you can identify which modules are available in the repositories and select the appropriate stream before you install a module. Procedure List the module information in one of the following ways: List all available modules: Use the yum module list <module_name> command to list the same information but only for a specific module. Search for which module provides a certain package: For example, to display which module and profiles provide the npm package, enter: Use one of these methods to list module details: List all details about a module, including a description, list of all profiles, and a list of all packages the module provides: For example, to display details about the nodejs module, enter: List which packages each module profile installs: Note Each of the profiles installs a different set of packages, including their dependencies. For example, to display this information for the nodejs module, enter: Additional resources Introduction to modules 4.7. Specifying global expressions in YUM input You can filter the results of yum commands by appending one or more global expressions as arguments. Procedure Use one of the following methods if you use global expressions in yum commands: Enclose the entire global expression in single or double quotation marks: Note that you must precede <file_name> either by a backslash ( / ) character for an absolute path or */ to use a wildcard if the full path is unknown. Escape the wildcard characters by preceding them with a backslash ( \ ) character: 4.8. Additional resources Commands for listing content in RHEL 8 yum(8) man page on your system

Commands:
yum search <term>
yum search --all <term>
yum list --all cups.x86_64 1:2.2.6-57.el8 @rhel-AppStream cups-client.x86_64 1:2.2.6-57.el8 @rhel-AppStream cups-devel.i686 1:2.2.6-57.el8 rhel-AppStream cups-devel.x86_64 1:2.2.6-57.el8 rhel-AppStream
yum list --all cups-1:2.2.6-57.el8.x86_64 cups-client-1:2.2.6-57.el8.x86_64 cups-devel-1:2.2.6-57.el8.i686 cups-devel-1:2.2.6-57.el8.x86_64
yum repolist
yum repoinfo <repository_name>
yum info <package_name>
yum group list
yum group info <group_name>
yum group summary
yum module list Name Stream Profiles Summary nodejs 18 common [d], development, minimal, s2i Javascript runtime postgresql 15 client, server [d] PostgreSQL server and client module Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
yum module provides <package_name>
yum module provides npm npm-1:8.19.4-1.16.20.2.4.module+el8.9.0+21536+8fdee1fb.x86_64 Module : nodejs:16:8090020240315081818:a75119d5:x86_64 Profiles : common development s2i Repo : rhel-AppStream Summary : Javascript runtime
yum module info <module_name>
yum module info nodejs Name : nodejs Stream : 20 Version : 8090020240228165436 Context : a75119d5 Architecture : x86_64 Profiles : common [d], development, minimal, s2i Default profiles : common Repo : rhel-AppStream Summary : Javascript runtime Description : Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices. Requires : platform:[el8] Artifacts : nodejs-1:20.11.1-1.module+el8.9.0+21380+12032667.src : nodejs-1:20.11.1-1.module+el8.9.0+21380+12032667.x86_64
yum module info --profile <module_name>
yum module info --profile nodejs Name : nodejs:18:8090020240301110609:a75119d5:x86_64 common : nodejs : npm development : nodejs : nodejs-devel : npm minimal : nodejs s2i : nodejs : nodejs-nodemon : npm
yum provides "*/ <file_name> "
yum provides \*/ <file-name>