????????????date?÷?????????￡?
????1.??????   [root@linuxa ~]# date
????Thu Oct 22 20:44:51 CST 2015
????2.??????? [root@linuxa ~]# date +%F
????2015-10-22
????3.??????[root@linuxa ~]# date +%T
????20:46:50
????====================???????man date??================
????%Y?????
????%m?????
????%d?????
????%H???С?????????????00-23??
????%M???????
????%S?????
????%s?????unix????????????
????========================================================
????4.???????????
????[root@linuxa ~]# date -s "2015-10-22 20:49:22"
????Thu Oct 22 20:49:22 CST 2015
????[root@linuxa ~]# date -s 2013-1-5
????Sat Jan  5 00:00:00 CST 2013
????[root@linuxa ~]# date -s 20:22:22
????Sat Jan  5 20:22:22 CST 2013
????5.??????????hwclock???????
????[root@linuxa ~]# hwclock
????Thu 22 Oct 2015 08:51:24 PM CST  -1.055292 seconds
????[root@linuxa ~]# hwclock --hctosys
????[root@linuxa ~]# date
????Thu Oct 22 20:51:50 CST 2015
????===========hctosys??systohc===hwд??sys??sysд??hw=========================