hwclock -r # BIOS time to read
hwclock -w # to the current system time into the BIOS
date -s 2010/10/02 # Set date
date -s 15:02:35 # set the minutes and seconds
/ Usr / bin / rdate rdate.darkorb.net # 1 Time synchronization
/ Usr / sbin / ntpdate time.nist.gov # 2 Time Synchronization
# Set the time zone
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
# BIOS clock synchronization to force the system time to write CMOS, the following command:
clock -w
# Add regular tasks, 0:00 daily automatic synchronization time
crontab -e
0 0 * * * /usr/bin/rdate -s rdate.darkorb.net
Perhaps some friends servers are not set up a scheduled task to synchronize time over it, suggest that you add a timing synchronization, time server and the user's system to avoid the time difference is too big
Reproduced in: https: //my.oschina.net/zhouz/blog/213195