replace module and lineinfile are not editing the file

Archives Ansible Project
1

I want to change the value of "readahead" to 256, i have tried using both replace and lineinfile modules, both modules don’t seem to work. they show the task as changed but when i log in and see the value stays the same.

2

Here you say, run every task on the localhost.
If you check the machine you are running Ansible from aka Control
Machine you'll see that the files is changed there.

3

sorry, i meant to say the value is not being changed on target machine but ansible shows it as changed.