Linux 修改時間的指令

查詢現在的時間

date "+%Y%m%d%H%M.%S"

%Y->年

%m->月

%d->日

%H->時

%M->分

%S->秒

查出來後可直接下指令改 date 200907081058.30

直接改日期

date -s 2009/07/08

或直接改時間

date -s 10:58:30

有連上internet的話可用NTP校時

ntpdate watch.stdtime.gov.tw

或

ntpdate time.stdtime.gov.tw

[root@linux ~]# vi /etc/crontab
00 5 * * * root /usr/sbin/ntpdate tock.stdtime.gov.tw && /sbin/hwclock -w
#每天早上五點對時並寫入到BIOS裡

國外的校時伺服器列表：

參考自 http://tycho.usno.navy.mil/ntp.html

Please note that these servers support only Network Time Protocol (Internet RFC-1305a) and Simple Network Time Protocol (SNTP).

U.S. EASTERN TIME ZONE
ntp2.usno.navy.mil
tock.usno.navy.mil
tick.usno.navy.mil
ntp-s1.cise.ufl.edu (CNAME ntp-ufl.usno.navy.mil)
ntp.colby.edu (CNAME ntp-colby.usno.navy.mil)
navobs1.oar.net (CNAME ntp-oar.usno.navy.mil)
gnomon.cc.columbia.edu (CNAME ntp-cu.usno.navy.mil)
tick.gatech.edu (CNAME ntp-gatech.usno.navy.mil)
navobs1.mit.edu (CNAMES ntp-mit.usno.navy.mil, tick.mit.edu)

U.S. CENTRAL TIME ZONE
now.cis.okstate.edu
ntp0.mcs.anl.gov (CNAME ntp-anl.usno.navy.mil)
navobs1.wustl.edu (CNAME ntp-wustl.usno.navy.mil)
tick.uh.edu (CNAME ntp-uh.usno.navy.mil)

U.S. MOUNTAIN TIME ZONE
tick.usnogps.navy.mil (CNAME tick.usnogps.navy.mil)
tock.usnogps.navy.mil (CNAME tock.usnogps.navy.mil)

U.S. PACIFIC TIME ZONE
montpelier.caltech.edu (CNAME ntp-caltech.usno.navy.mil)
bigben.cac.washington.edu (CNAME ntp-uw.usno.navy.mil)
tick.ucla.edu (CNAME ntp-ucla.usno.navy.mil)
usno.pa-x.dec.com (CNAME ntp-dec.usno.navy.mil)

ALASKA TIME ZONE
ntp.alaska.edu (CNAME ntp-ua.usno.navy.mil)

HAWAII TIME ZONE
tick.mhpcc.hpc.mil