Ansible Command module says that ‘|’ is illegal character

The ansible.builtin.command module in Ansible has some restrictions, and one of them is that it does not support shell-specific operations like pipes (|), redirects (>, >>), or using environment variables. This is because the command module executes commands directly, without invoking a shell. To use shell features like the pipe operator (|), you need to use the ansible.builtin.shell module instead.

Solutions

1. Use the ansible.builtin.shell Module

Switch from using the command module to the shell module if you need to use pipes or other shell features.

Example.

- name: Using shell module with pipe
  ansible.builtin.shell: "cat /etc/passwd | grep root"

2. Use the ansible.builtin.command Module without Shell Features

If you do not need shell features, you should structure your command without pipes or other shell-specific syntax.

Example.

- name: Using command module without shell features
  ansible.builtin.command:
    cmd: "cat /etc/passwd"

• Use ansible.builtin.shell if you need to use shell features like pipes.
• Use ansible.builtin.command for simple commands without shell features.

Using the appropriate module based on your needs will avoid errors like '|' is an illegal character.

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