From b518533417d03b8e30af3386f5209f3326f6f541 Mon Sep 17 00:00:00 2001
From: Peter Nguyen <facebook@bibube.com>
Date: Sat, 9 Nov 2024 01:59:25 +0000
Subject: [PATCH] Delete append_to_cmdline_txt.md

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 playbooks/append_to_cmdline_txt.md | 64 ------------------------------
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-To create an Ansible playbook that appends the specified kernel parameters (`rootwait cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory`) to the `/boot/firmware/cmdline.txt` file only if they are not already present, you can use the `lineinfile` Ansible module.
-
-Here's how the playbook can be written:
-
-### Ansible Playbook (`append_cmdline.yml`):
-
-```yaml
----
-- name: Ensure required parameters are in /boot/firmware/cmdline.txt
-  hosts: raspberry_pi
-  become: yes
-  tasks:
-    - name: Append kernel parameters to cmdline.txt if not present
-      lineinfile:
-        path: /boot/firmware/cmdline.txt
-        line: "rootwait cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory"
-        insertafter: EOF
-        state: present
-        create: yes
-        backup: yes  # This creates a backup of the file before making changes
-      notify:
-        - Reboot system
-
-  handlers:
-    - name: Reboot system
-      reboot:
-        msg: "Rebooting system to apply new kernel parameters"
-        reboot_timeout: 600
-        test_command: uptime
-```
-
-### Explanation of the Playbook:
-
-- **`hosts: raspberry_pi`**: Targets the Raspberry Pi group from your inventory.
-- **`become: yes`**: Ensures that the task runs with elevated privileges (sudo), which is necessary for modifying system files like `/boot/firmware/cmdline.txt`.
-  
-### Task:
-
-- **`lineinfile` module**: 
-  - `path: /boot/firmware/cmdline.txt`: This specifies the file to modify.
-  - `line`: This is the exact string to ensure is present in the file.
-  - `insertafter: EOF`: This ensures the line is appended at the end of the file if it is not already there.
-  - `state: present`: Ensures that the specified line exists in the file.
-  - `create: yes`: If the file doesn't exist, it will be created (though it's unlikely in this case because `/boot/firmware/cmdline.txt` should exist on a Raspberry Pi).
-  - `backup: yes`: This creates a backup of the file before modifying it (important for safety).
-
-### Handler:
-
-- **`Reboot system` handler**: 
-  - This handler is triggered if the task changes the file (i.e., if it appends the line). 
-  - It will reboot the Raspberry Pi to apply the changes, which often requires a reboot to take effect.
-  - `reboot_timeout: 600` specifies that the playbook will wait up to 600 seconds for the system to reboot successfully.
-  - `test_command: uptime` ensures that the system is back up and running after the reboot.
-
-### To run the playbook:
-
-1. Save the playbook to a file, e.g., `append_cmdline.yml`.
-2. Run the playbook with the following command:
-
-   ```bash
-   ansible-playbook -i inventory.ini append_cmdline.yml
-   ```
-
-This will ensure the specified parameters are added to `/boot/firmware/cmdline.txt` only if they are not already present and reboot the system if necessary. If you have any more questions or need further adjustments, feel free to ask!
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