How to run a daemon as a non-root user?

Question

linux

There is a sphinx daemon that runs as the root user, you need to run it as a separate user. How can I do that?

Answer 1

For starters, Linux is a lot. Specify in which file the launch of the daemon is described, in fact, the file itself can be thrown.
In the old init.d, most likely just via runuser or su
in the new one declaratively in the unit file
[Service]
User=anotheruser
Group=anothergroup

Answer 2

specify in its settings under which user it should work

Answer 3

It is possible with a cron, because /etc/crontab specifies the username on whose behalf to run the command.
here - how to run as another user from the console,
here how to run from the console using sudo with editing /etc/sudoers