我有一台带有 ubuntu 16.04 的服务器。重新启动后，它警告：
systemd[1]: systemd-modules-load.service: Main process exited, code=exited, status=1/FAILURE
systemd[1]: Failed to start Load Kernel Modules.
[FAILED] Failed to start Load Kernel Modules.
See 'systemctl status systemd-modules-load.service' for details.
systemd[1]: systemd-modules-load.service: Unit entered failed state.
systemd[1]: systemd-modules-load.service: Failed with result 'exit-code
所以在控制台中，以 root 身份：
$ systemctl status systemd-modules-load
? systemd-modules-load.service - Load Kernel Modules
Loaded: loaded (/lib/systemd/system/systemd-modules-load.service; static; vendor preset: enabled)
Active: failed (Result: exit-code) since Sat 2016-08-20 16:23:47 UTC; 11min ago
Docs: man:systemd-modules-load.service(8)
man:modules-load.d(5)
Process: 3328 ExecStart=/lib/systemd/systemd-modules-load …