修改时区
sudo dpkg-reconfigure tzdata
出现时区列表，按照提示选择“Asia/Shanghai”
结果如下
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Package configuration
┌───────────────────────┤ Configuring tzdata ├───────────────────────┐
│ Please select the city or region corresponding to your time zone. │
│ │
│ Time zone: │
│ │
│ Qyzylorda ↑ │
│ Rangoon ▒ │
│ Riyadh ▒ │
│ Sakhalin ▒ │
│ Samarkand ▒ │
│ Seoul ▒ │
│ Shanghai ▮ │
│ Singapore ▒ │
│ Srednekolymsk ▒ │
│ Taipei ↓ │
│ │
│ │
│ <Ok> <Cancel> │
│ │
└────────────────────────────────────────────────────────────────────┘
Current default time zone: 'Asia/Shanghai'
Local time is now: Mon Aug 15 00:11:59 CST 2016.
Universal Time is now: Sun Aug 14 16:11:59 UTC 2016.
ubuntu@master:~$ date
Mon Aug 15 00:12:13 CST 2016
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