Ubuntu开机卡“A start job is running for wait for network to be Configured”解决方法：
1、进入目录 /etc/systemd/system/network-online.target.wants
root@proxy:/etc/systemd/system/network-online.target.wants# ll
total 8
drwxr-xr-x 2 root root 4096 Aug 31 06:52 ./
drwxr-xr-x 20 root root 4096 Nov 28 01:57 ../
lrwxrwxrwx 1 root root 56 Jun 30 12:06 systemd-networkd-wait-online.service -> /lib/systemd/system/systemd-networkd-wait-online.service
2、vim systemd-networkd-wait-online.service， 添加TimeoutStartSec=2sec
[Service]
TimeoutStartSec=2sec