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Network service discovery disabled

经常会遇到一个问题：在开机或者切换网络过程中，右上角弹出一个提示框，显示

Network service discovery disabled

参考Network service discovery disabled: What does this mean for me?

进入目录/etc/default/，修改文件avahi-daemon如下：

# 1 = Try to detect unicast dns servers that serve .local and disable avahi in
# that case, 0 = Don't try to detect .local unicast dns servers, can cause
# troubles on misconfigured networks
# AVAHI_DAEMON_DETECT_LOCAL=1
AVAHI_DAEMON_DETECT_LOCAL=0

重启即可