Permanent system time modification in CentOS

Permanent system time modification in CentOS

When Centos is used, if the local time is not correct, the command date-s "15:15:15" takes effect immediately. However, after the system is restarted, the system time remains the same.

Find the information and make a summary.

My Centos is installed on a virtual machine. The virtual machine has the sub-system time and hardware time. One of the changes is that there is no way to work, and both must be changed.

1. date {view current local time}

2. hwclock -- show {view hardware time}

3. If the hardware time is not correct, modify the hardware time,

4. hwclock -- set -- date '014-12-15 15:15:15 '{set hardware time}

5. hwclock -- hctosys {set the system time and hardware time synchronization}

6. clock-w {save clock}

7. After restarting init 6, check whether the system time has taken effect !!!! 1