ansible-galaxy:tldr:8275f

The command "ansible-galaxy install ${username}.${role_name}" is used to install an Ansible role from Ansible Galaxy, a repository for sharing and managing Ansible content.

Here's a breakdown of the command:

• "ansible-galaxy install" is the main command to install Ansible roles.
• "${username}" represents the username or organization name under which the role is published. It is usually the owner or creator of the role.
• "." is used to separate the username and the role name.
• "${role_name}" represents the name of the role you want to install.

When executing this command, Ansible Galaxy searches for the role specified in the repository. If found, it downloads and installs the role in a location where Ansible can locate it later during the playbook execution.

For example, if you want to install a role called "webserver" created by the user "john-doe", you would replace "${username}" with "john-doe" and "${role_name}" with "webserver" in the command:

ansible-galaxy install john-doe.webserver