Ansible Module command

External

• https://docs.ansible.com/ansible/latest/collections/ansible/builtin/command_module.html

Internal

• Ansible Concepts
• Ansible Privilege Escalation

Overview

The command module takes the command name followed by a list of space-delimited arguments.

A command will NOT be interpreted by a shell, so variables like $HOME and operations like "<", ">", "|", ";" and "&" will not work. Use the shelll module for that.

- name: A command example
  command: some-command arg1 arg2
  become: true
  become_user: root
  args:
    chdir: /somedir/

"become" and "become_user" are optional. Also see:

Ansible Privilege Escalation

Registering Variables as Results of Command Execution

This sets a variable:

- name: Read required JDK version
  command: "sh -c \"finger `whoami` | awk -F: '{ print $3 }' | head -n1 | sed 's/^ //'\""
  register: name_cmd
  changed_when: false
  when: name is not defined