解决Ubuntu18.04 LTS网络图标不见了

1、删除NetworkManager缓存文件

service NetworkManager stop

sudo rm /var/lib/NetworkManager/NetworkManager.state

service NetworkManager start

2、修改/etc/NetworkManager/NetworkManager.conf

managed=true

3、重启NetworkManager

sudo service network-manager restart

原文：https://www.cnblogs.com/zhaihongliangblogger/p/14696367.html