What is the meaning of "Permission denied" when the shell module is executed in ansible?

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"Permission denied" when the shell module is executed in Ansible means that the user running the playbook or command does not have the necessary permissions to execute the specified command on the target system. This could be due to a variety of reasons, such as insufficient privileges, incorrect file or directory permissions, or a firewall blocking the connection. To resolve this issue, the user must be given the appropriate permissions or the necessary changes must be made to the target system's settings.