How do sysadmins perform large tasks quickly?

user162426 asked:

See this scenario:-

“Hello, I would like the user ‘bob’ created on these servers with sudo rights: list of 10 IP’s

How does a Unix sysadmin typically go about creating the user ‘bob’ with sudo rights on each server without having to do it manually?

I answered:

Parallel SSH is one way to solve this specific problem, in a small installation without any existing configuration management.

In larger deployments we often use configuration management tools, such as Puppet, Chef or cfengine.

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