### Install Docker (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Installs Docker on a Debian-based system using apt. This is a prerequisite for using Docker as a container runtime.

```bash
sudo apt install docker.io
```

--------------------------------

### Install Podman (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Installs Podman on a Debian-based system using apt. This is a prerequisite for using Podman as a container runtime.

```bash
sudo apt install podman
```

--------------------------------

### Install Ansible with Apt (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Installs Ansible on a Debian-based system using apt. This is an alternative to installing via Conda.

```bash
sudo apt install ansible
```

--------------------------------

### Install Ansible with Conda (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Installs Ansible using the Conda package manager, freezing installed packages to ensure stability. This is for local installation.

```bash
conda install --freeze-installed -y ansible
```

--------------------------------

### Start a Systemd Service (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Starts a systemd service named 'deribit'. Requires sudo if managing system-level services.

```bash
systemctl start deribit
```

--------------------------------

### Ansible Inventory File Example

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Defines a basic Ansible inventory file. It specifies the target host 'server' with its IP address and SSH user, and uses 'become_user' for elevated privileges when scope is 'system'.

```ini
[example]
server ansible_host="a.b.c.d" ansible_user="ansible" become_user="root"
```

--------------------------------

### Ansible Inventory File Local Example

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Defines an Ansible inventory file for local execution. It specifies 'localhost' as the target host and the current user, not requiring elevated privileges.

```ini
[example]
server ansible_host="localhost" ansible_user="my_user_id"
```

--------------------------------

### Run Ansible Playbook with Elevated Privileges (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Executes an Ansible playbook using 'ansible-playbook'. The '--ask-become-pass' flag prompts for the password required for elevated privileges (e.g., when systemd.scope is 'system').

```bash
ansible-playbook -i example site.yml --ask-become-pass
```

--------------------------------

### Tail Systemd Service Logs (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Continuously displays logs for the systemd service 'deribit'. Requires sudo if managing system-level services.

```bash
journalctl -f -u deribit
```

--------------------------------

### Run Ansible Playbook Without Elevated Privileges (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Executes an Ansible playbook without requiring elevated privileges. This is typically used when systemd.scope is set to 'user'.

```bash
ansible-playbook -i example site.yml
```

--------------------------------

### Reset Failed Systemd Service (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Resets a failed systemd service named 'deribit'. Requires sudo if managing system-level services.

```bash
systemctl reset-failed deribit
```

--------------------------------

### Check Systemd Service Status (Bash)

Source: https://github.com/roq-trading/roq-ansible/blob/master/README.md

Checks the status of a systemd service named 'deribit'. Requires sudo if managing system-level services.

```bash
systemctl status deribit
```

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