ubuntu下无网络链接图标办法解决及wifi搜寻问题

ubuntu下面板上无网络连接的图标办法解决
删除旧的网络配置，重新让networkManager自动配置
sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start

sudo vim /etc/NetworkManager/nm-system-settings.conf
false-- 改成--true
sudo service network-manager restart

ubuntu系统搜捕到wifi解决方法
vim /etc/NetworManager/NetworkNamager.conf
将managed=false 改成managed=true