What is the legal ruling on taking food from the military barracks kitchen for personal use without the unit commander's knowledge, and is this considered illicitly consuming public funds?

It is not permissible for a soldier to take food from the army unless authorized by the responsible official. The responsibility of knowing who is authorized to grant permission lies with the army's regulations and laws. If food is taken without the permission of the authorized official, it is not permissible to consume it. Those who do so must be prohibited and warned against consuming others' property unlawfully.