To create a custom Netdata monitor configuration that uses a command-line tool to provide the metric, you'll need to use the `charts.d` plugin. This plugin allows you to create a custom data collector in Bash or any other scripting language.

Let's say you have a command-line tool named `my_tool` that outputs a single value representing the metric you want to monitor. Here's a step-by-step example of how to create a custom monitor configuration for Netdata using the `charts.d` plugin:

1. Create a new file called `my_tool.chart.sh` in the `/etc/netdata/charts.d/ `directory.

```bash
sudo touch /etc/netdata/charts.d/my_tool.chart.sh
sudo chmod +x /etc/netdata/charts.d/my_tool.chart.sh
```

2. Open the file in your favorite text editor, and add the following content:

```bash
#!/usr/bin/env bash

# Define the required functions
my_tool_check() {
    # Check if the command-line tool is available
    command -v my_tool >/dev/null 2>&1 || return 1
    return 0
}

my_tool_create() {
    # Create the chart with dimensions
    cat << _EOF_
CHART my_tool.metric '' "My Tool Metric" "value" "my_tool" "my_tool.metric" line 10000 1
DIMENSION my_tool_value '' absolute 1 1
_EOF_
    return 0
}

my_tool_update() {
    # Get the metric value from the command-line tool
    local my_tool_output="$(my_tool)"

    # Update the chart with the new value
    cat << _EOF_
BEGIN my_tool.metric
SET my_tool_value = $my_tool_output
END
_EOF_

    return 0
}

# Call the appropriate functions based on the first argument
case "${1}" in
    check)
        my_tool_check
        ;;
    create)
        my_tool_create
        ;;
    update)
        my_tool_update
        ;;
    *)
        exit 1
        ;;
esac
```

3. Restart the Netdata service to load the new custom collector:

```bash
sudo systemctl restart netdata
````

You should now see a new chart in the Netdata dashboard under the `my_tool` section, displaying the metric provided by the `my_tool` command-line tool.

Remember to replace `my_tool` with the actual name of your command-line tool and update the chart title, units, and other details accordingly.
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