While mature and time-honored, not modern, utilities like sed and envsubst go a long way to managing any config. Making a "modern cli" application that wraps ex

While mature and time-honored, not modern, utilities like sed and envsubst go a long way to managing any config. Making a "modern cli" application that wraps existing functions is like giving someone a fish, as opposed to teaching them to fish with stable and ubiquitously available tools. Create entry (using a template and exported variables): $ envsubst < .ssh/template.config >> .ssh/config Read entry (assuming the 4 line template): $ sed -n /<Host entry>/,+3p .ssh/config Update entry: Delete and Create Delete entry (assuming the 4 line template): $ sed -i /<Host entry>/,+3d .ssh/config