Linux exec with unprivileged user

Question

I have a /ect/init/app.conf file that looks something like...

start on filesystem and net-device-up IFACE!=lo
stop on runlevel [016]
respawn

chdir /home/richie/application
exec app >> /var/log/app.log 2>&1

How can I change the exec line to run as an unprivileged user?

Answer 1

exec sudo -u username app > /var/log/app.log 2>&1