ubuntu 16.04 boot 啟動報錯

• 1，ubuntu系統版本
• 2，dns-clean.service 報錯
• 3，plymouth-quit.service報錯，待解決

1，ubuntu系統版本

# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.04.5 LTS
Release:	16.04
Codename:	xenial

2，dns-clean.service 報錯

• boot 輸出錯誤資訊

[Failed] Failed to start Clean up any mess left by Odns-up. See systemctl status dns-clean.service for details.

• 修改dns-clean.service檔案mkdir新增-p引數

# vim /lib/systemd/system/dns-clean.service 

#ExecStartPre=/bin/mkdir /var/run/pppconfig
ExecStartPre=/bin/mkdir -p  /var/run/pppconfig

# reboot

3，plymouth-quit.service報錯，待解決

參考：

1. Ubuntu will not boot help
2. pppconfig: Failed to start Clean up any mess left by 0dns-up
3. ExecStartPre=/bin/mkdir -p /var/run/pppconfig