Time settings for Linux systems

1. Linux system time is divided into
   

   System time SYS and hardware time;

System time: The time of the Linux kernel;

Hardware time: BIOS time;

UTC Time: GMT (Global Standard Time)

Beijing Time (East Eight district) =utc+8h;

2. Viewing time

Date display is the system time;

Hwclock-r | | Hwclock--show shows the hardware time (Beijing time);

hwclock-d display hardware (both Beijing time and UTC time)

3. Change or Sync time

Date-s Modifying the system time

Example: Date-s "2014-10-10 8:49:00"

To modify hardware time:

Boot into BIOS modification

Can be synchronized through the system time;
Hwclock--SYSTOHC System time synchronization hardware time;

Hwclock--hctosys Hardware time synchronization system time;

4. How is the time not changed?

First modify the time zone: Cp/usr/share/zoneinfo/asia/shanghai/etc/localtime overwrite?yes

Then modify the system time: Date-s ' 2014-10-10 8:58:30 '

Last Sync hardware time: Hwclock--SYSTOHC

The first time to write a blog, a little excited, hey!! 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0063.gif "alt=" J_0063.gif "/>

This article is from the "9379746" blog, please be sure to keep this source http://9389746.blog.51cto.com/9379746/1561949

Time settings for Linux systems