Concept ACK.
IMO this pr could be complemented with a check_setup_for_service.sh

Something like this

#!/bin/bash

# This script is intended to serve as a demonstration of which setup floresta.service needs to run properly.

# Check if the group 'florestad' exists
if getent group florestad > /dev/null 2>&1; then
    echo "Group 'florestad' exists."
else
    echo "Group 'florestad' does not exist."
    return 1
fi

# Check if the user 'florestad' exists
if id -u florestad > /dev/null 2>&1; then
    echo "User 'florestad' exists."
else
    echo "User 'florestad' does not exist."
    return 11
fi

# Check if the directory /var/lib/florestad exists and has proper permissions
if [ -d "/var/lib/florestad" ]; then
    echo "Directory '/var/lib/florestad' exists."
    if [ "$(stat -c '%U' /var/lib/florestad)" == "florestad" ] && [ "$(stat -c '%G' /var/lib/florestad)" == "florestad" ]; then
        echo "Directory '/var/lib/florestad' is owned by user 'florestad' and group 'florestad'."
    else
        echo "Directory '/var/lib/florestad' is not owned by user 'florestad' and group 'florestad'."
        return 1
        fi
else
    echo "Directory '/var/lib/florestad' does not exist."
    return 1
fi

# Check if the directory /etc/florestad exists and has proper permissions
if [ -d "/etc/florestad" ]; then
    echo "Directory '/etc/florestad' exists."
    if [ "$(stat -c '%U' /etc/florestad)" == "florestad" ] && [ "$(stat -c '%G' /etc/florestad)" == "florestad" ]; then
        echo "Directory '/etc/florestad' is owned by user 'florestad' and group 'florestad'."
    else
        echo "Directory '/etc/florestad' is not owned by user 'florestad' and group 'florestad'."
        return 1
        fi
else

    echo "Directory '/etc/florestad' does not exist."
    return 1
fi

Concept ACK. IMO this pr could be complemented with a check_setup_for_service.sh

Something like this

#!/bin/bash

# This script is intended to serve as a demonstration of which setup floresta.service needs to run properly.

# Check if the group 'florestad' exists
if getent group florestad > /dev/null 2>&1; then
    echo "Group 'florestad' exists."
else
    echo "Group 'florestad' does not exist."
    return 1
fi

# Check if the user 'florestad' exists
if id -u florestad > /dev/null 2>&1; then
    echo "User 'florestad' exists."
else
    echo "User 'florestad' does not exist."
    return 11
fi

# Check if the directory /var/lib/florestad exists and has proper permissions
if [ -d "/var/lib/florestad" ]; then
    echo "Directory '/var/lib/florestad' exists."
    if [ "$(stat -c '%U' /var/lib/florestad)" == "florestad" ] && [ "$(stat -c '%G' /var/lib/florestad)" == "florestad" ]; then
        echo "Directory '/var/lib/florestad' is owned by user 'florestad' and group 'florestad'."
    else
        echo "Directory '/var/lib/florestad' is not owned by user 'florestad' and group 'florestad'."
        return 1
        fi
else
    echo "Directory '/var/lib/florestad' does not exist."
    return 1
fi

# Check if the directory /etc/florestad exists and has proper permissions
if [ -d "/etc/florestad" ]; then
    echo "Directory '/etc/florestad' exists."
    if [ "$(stat -c '%U' /etc/florestad)" == "florestad" ] && [ "$(stat -c '%G' /etc/florestad)" == "florestad" ]; then
        echo "Directory '/etc/florestad' is owned by user 'florestad' and group 'florestad'."
    else
        echo "Directory '/etc/florestad' is not owned by user 'florestad' and group 'florestad'."
        return 1
        fi
else

    echo "Directory '/etc/florestad' does not exist."
    return 1
fi

Those configurations should come from your package manager. And any decent PM would check those anyway.

@luisschwab done!

Found a few more issues, but this should be it.

Fixed. I'm intentionally making it only group-readable, so I've updated the PR description with mode 0710 instead of 0770

Found a few more issues, but this should be it.

Found a few more. Third time's the charm!

Jeez, now I think I got all of them

ACK 66afab5