lineinfile module in Ansible

Question

I have a file with has the following content

#crap

I want to uncomment it. How do I write a playbook for the following requirement?

Answer 1

You can use the lineinfile module for this purpose. This module will search a file for a line, and ensure that it is present or absent. This is useful when you want to change a single line in a file only.

Something like this should work:

- name: test lineinfile
  lineinfile: backup=yes state=present dest=/etc/foo.txt
              regexp='^#crap'
              line='crap'