CentOS6 更改时区方法（以设置 UTC+8 为例）

Kevin 教程 3,794 次浏览 47条评论

为方便平时查看带时间戳的日志/事件，系统常规设置项之一是修改默认时区。不同于 CentOS7 可以用简单一句命令搞定，CentOS6 稍微麻烦了些，下面介绍具体设置方法。

查看当前时区

查询当前系统使用的时区。下面示例输出使用的北美东部夏令时间（EDT，UTC−4 时区）。

[test@localhost ~]$ date
Thu Mar 21 22:30:53 EDT 2019

设置系统时区

使用下面命令设置系统时区，红色部分是时区参数，完整时区名称列表这里有介绍。

# 设置 上海 UTC+8 时区
sudo ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

# 设置 香港 UTC+8 时区
sudo ln -sf /usr/share/zoneinfo/Asia/Hong_Kong /etc/localtime

# 设置 台北 UTC+8 时区
sudo ln -sf /usr/share/zoneinfo/Asia/Taipei /etc/localtime

# 设置 北美东部标准 UTC-5 时区
sudo ln -sf /usr/share/zoneinfo/EST /etc/localtime

# 设置 协调世界时 UTC 时区
sudo ln -sf /usr/share/zoneinfo/UTC /etc/localtime

设置硬件时区

如需修改硬件设备时区，编辑下面文件。

sudo vi /etc/sysconfig/clock

修改其中的 ZONE 参数值，并额外添加两行，将 UTC（BIOS 时间） 和 ARC 参数设置为 false。

ZONE="Asia/Shanghai"
UTC=false
ARC=false

更新硬件时间。用sudo hwclock命令查询验证（date查询的是系统时间）。

sudo hwclock --systohc --localtime

定期同步时间

如果需要定期检查调准时间，可以设置 NTP 时间同步服务。

# 安装 NTP 软件包
sudo yum -y install ntp

# 添加可信任的 NTP 时间同步服务器
sudo ntpdate -d asia.pool.ntp.org

# 重启刷新 NTP 服务
sudo service ntpd restart

如果启用了系统防火墙并采取白名单方式管理端口，别忘了添加允许 NTP 所使用的 123/UDP 端口。如果不清楚如何设置防火墙，可参考之前有关 Iptables 或 Firewalld 的使用教程文章。

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