bash-2.03# man date
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User Commands date(1)
NAME
date - write the date and time
SYNOPSIS
/usr/bin/date [ -u ] [ + format ]
/usr/bin/date [ -a [ - ] sss.fff ]
/usr/bin/date [ -u ] [ [ mmdd ] HHMM | mmddHHMM [ cc ]
yy ] [ .SS ]
/usr/xpg4/bin/date [ -u ] [ + format ]
/usr/xpg4/bin/date [ -a [ - ] sss.fff ]
/usr/xpg4/bin/date [ -u ] [ [ mmdd ] HHMM | mmddHHMM [
cc ] yy ] [ .SS ]
DESCRIPTION
The date utility writes the date and time to standard output
or attempts to set the system date and time. By default, the
current date and time will be written.
Specifications of native language translations of month and
weekday names are supported. The month and weekday names
used for a language are based on the locale specified by the
environment variable LC_TIME; see environ(5).
The following is the default form for the "C" locale:
%a %b %e %T %Z %Y
for example,
Fri Dec 23 10:10:42 EST 1988
OPTIONS
The following options are supported:
-a [-]sss.fff
Slowly adjust the time by sss.fff seconds (fff
represents fractions of a second). This adjustment can
be positive or negative. The system's clock will be
sped up or slowed down until it has drifted by the
number of seconds specified. Only the super-user may
adjust the time.
-u Display (or set) the date in Greenwich Mean Time
(GMT-universal time), bypassing the normal conversion
to (or from) local time.
---------------------------------------------
bash-2.03# date Fri Jan 25 03:42:55 CST 2008
bash-2.03# date -u 102419422008
Fri Oct 24 19:42:00 GMT 2008
bash-2.03# date
Sat Oct 25 03:42:07 CST 2008
bash-2.03# date
Sat Oct 25 03:42:19 CST 2008
bash-2.03# date
改完，回显是对的，但再查一下，就不对了，时区变了？