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In this lesson, you will learn about Ansible ad hoc commands.

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So Ansible provides more than 3,000 different modules.

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And about 70 modules are provided in the Ansible core package.

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So you'll get 70 modules more or less after installing Ansible core.

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If you need additional modules, you can get them as a content collection.

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The content collections are provided through the Ansible community website on https.galaxy.exe.

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And Ansible content collections are provided from the community website galaxy.ansible.com.

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Modules in Ansible provide specific functionality.

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And they run as Python scripts on the managed nodes.

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That's also where the Python requirement comes from.

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You can use Ansible doc-l for a list of all modules.

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And modules can be used in ad hoc commands.

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For instance, you can use ansible-ubuntu-i-inventory-u-student-b indicates that you want to use bcomprivileges,

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minus-k prompts for the bcompassword, minus-m user is using the user module, and minus-a

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name is Linda, will add a user with the name Linda.

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And likewise, here you see the package module, where the package module is a very flexible

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module that allows you to install packages on any Linux distribution.

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Apart from these modules, there's also the command module.

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If for a specific task you can't find a specific Ansible module, you can always run it as a

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Linux command in the command module.

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But the golden rule in Ansible is use always the most Ansible way.

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So if you have a specific module, you should be using that.

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Let me demonstrate these two examples on the slide.

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So I'm going to use ansible-ubuntu-i-inventory-u-student-b, I want to do this using my current user account,

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minus-b, I want to use bcomprivileges, and minus-k, I want Ansible to prompt for the

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bcompassword.

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And next, minus-m, user is calling the user module, and minus-a, name is Linda, is providing

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the argument with the user name.

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And that is going to make sure that this user will be created on the remote machine.

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Now we can see the output of the Ansible module, which is telling me Ansible changed through,

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so it has successfully created the user.

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Now the fun thing is, if I run the same module again, it is not going to complain, it's just

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telling me, hey, it changed false, the user already existed, no works, was required.

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This is what we call idempotency, meaning that if the current state on the managed host

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already meets the desired state, nothing has to be done.

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Now let me change this command a little bit, and make it minus-m, packets, minus-a, name

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is nmap, that's going to install the nmap packets on the remote host.

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Using modules that install packages may take a little bit of time, but here we can see

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it's already done.

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So that's how you use Ansible modules in Ansible ad hoc mode.