我将 Debian 9 升级到 10 Buster 服务器在重新启动后 24 小时后失去网络连接，我认为问题是它无法从 DHCP 服务器更新 IP 地址。
\n\n我看到里面有过期日期的/var/lib/dhcp文件。dhclient.eth0.leases
该服务在 Debian 9 上正常，在 Debian 10 上我看到此错误：
\n\nroot@debian:~# systemctl status networking.service\n\xe2\x97\x8f networking.service - Raise network interfaces\n Loaded: loaded (/lib/systemd/system/networking.service; enabled;\nvendor preset: enabled)\n Active: failed (Result: exit-code) since Thu 2019-07-25 15:18:02\nCEST; 2h 39min ago\n Docs: man:interfaces(5)\n Process: 380 ExecStart=/sbin/ifup -a --read-environment\n(code=exited, status=1/FAILURE)\n Main PID: 380 (code=exited, status=1/FAILURE)\n\nJul 25 15:18:01 debian-2gb-nbg1-2 dhclient[402]: DHCPREQUEST for\n116.203.xx.xx on eth0 to 255.255.255.255 port 67\nJul 25 15:18:01 …