avahi-daemon
The avahi-daemon Linux service runs on client machines to perform network-based Zeroconf service discovery. Avahi is an implementation of the DNS Service Discovery and Multicast DNS specifications for Zeroconf Networking. User applications receive notice of discovered network services and resources using the Linux D-Bus message passing. The daemon coordinates application efforts in caching replies, helping minimize network traffic. Avahi provides a set of language bindings, including Python and Mono. Because of its modularized architecture, Avahi is already integrated in major desktop components like GNOME’s Virtual File System or KDE’s input/output architecture. Refer http://avahi.org/ for further specifications. The avahi RPM package provides the /usr/sbin/avahi-daemon daemon and its configuration files.

我的机器没有无线设备，只作为文件服务器、下载服务器使用，所以应该关闭avahi-daemon
停止服务
systemctl stop avahi-daemon.socket
systemctl stop avahi-daemon.service
停止自动启动
systemctl disable avahi-daemon.socket
systemctl disable avahi-daemon.service