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# command-instead-of-shell
This rule identifies uses of `shell` modules instead of a `command` one when
this is not really needed. Shell is considerably slower than command and should
be avoided unless there is a special need for using shell features, like
environment variable expansion or chaining multiple commands using pipes.
## Problematic Code
```yaml
---
- name: Problematic example
hosts: localhost
tasks:
- name: Echo a message
ansible.builtin.shell: echo hello # <-- command is better in this case
changed_when: false
```
## Correct Code
```yaml
---
- name: Correct example
hosts: localhost
tasks:
- name: Echo a message
ansible.builtin.command: echo hello
changed_when: false
```
!!! note
This rule can be automatically fixed using [`--fix`](../autofix.md) option.
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