kutsyk_alexander

Can you share a content of /etc/fstab file? It is the first place I would check in your situation.

I try some tests based on your description, and I think I got a solution. Try to use host_vars

This is a playbook:

***
- name: Test for lemmy
  hosts: your_hosts
  vars:
    networks:
      ext:
        ipv4: "127.0.0.1"
  tasks:
    - name: Use template
      ansible.builtin.template:
        src: test.j2
        dest: "/etc/iptables/rules.v4"
        owner: root
        group: root
        mode: "0644"

This is a template file test.j2:

{% for rule in rules %}
{{ rule }}
{% endfor %}

This is a host2.yml file in a host_vars directory:

***
rules:
  - "-A INPUT -p tcp -s {{ networks['ext']['ipv4'] }} --dport 6000 -j ACCEPT"

For another hosts you can create separate host files with variable rules.

Which module do you use for inserting the template?

Install tlp for better battery performance.

sudo apt install tlp tlp-rdw

You can try Firejail

Linux Magic SysRq keys

OpenTTD

sudo swapon /dev/zram0

Source

Luke Smith

FreeCAD

If you like Factorio you definitely like Mindustry

Open source. Because for me this term is the most general.