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Validating Config Files in Puppet and Ansible

While doing some experiments with Ansible I came across a little snippet of code that I really liked - - name: manage /etc/sudoers template: src=sudoers.j2 dest=/etc/sudoers validate='visudo -cf %s' Ansible runs the command specified by ‘validate’ against the expanded templates contents and only copies the newly generated file in to place if it’s valid. This is a wonderful feature that will help stop you from making some potentially time consuming errors.

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