I have installed tftpd
on Ubuntu, but I think it not secure very much. So I read its manual, and it says:
The server should have the user ID with the lowest possible privilege.
I find the server has the root
$ ps -ef | grep xinetd
UID PID PPID C STIME TTY TIME CMD
root 3556 1 0 16:08 ? 00:00:00 /usr/sbin/xinetd -pidfile /var/run/xinetd.pid -stayalive -inetd_compat -inetd_ipv6
So how can I change its UID to the lowest possible privilege?
Any tip is welcome!