Linux自动更新时间

Can use ntpdate or rdate command to sync the datetime with remote server.

i.e.:

# ntpdate remote_server

or

# rdate -s remote_server

Also, sync the remote server periodically is a good idea!

# crontab -e

# auto sync with time server at 0:00 everyday
0 0 * * * rdate -t 60 -s stdtime.gov.hk