linux系统下date命令修改时间及hwclock硬件时间

[wangshumin@centoshostnameKL1 ~]$ date -s “2018-2-11 8:37:00”

date: 参数"8:37:00”" 缺少前导的"+"；
当使用选项来描述日期是，任何非选项参数都必须以"+"所引导的字符串出现
请尝试执行"date --help"来获取更多信息。
[wangshumin@centoshostnameKL1 ~]$ date -s "2018-2-11 8:37:00"
date: 无法设置日期: 不允许的操作
2018年 02月 11日 星期日 08:37:00 CST
[wangshumin@centoshostnameKL1 ~]$ sudo date -s "2018-2-11 8:37:00"
[sudo] password for wangshumin: 
2018年 02月 11日 星期日 08:37:00 CST
[wangshumin@centoshostnameKL1 ~]$  "hwclock -w"
-bash: hwclock -w: command not found
[wangshumin@centoshostnameKL1 ~]$ clock -w
Sorry, only the superuser can change the Hardware Clock.
[wangshumin@centoshostnameKL1 ~]$ sudo clock -w
[sudo] password for wangshumin: 
[wangshumin@centoshostnameKL1 ~]$ hwclock –w
hwclock - query and set the hardware clock (RTC)


Usage: hwclock [function] [options...]


Functions:
  -h | --help         show this help
  -r | --show         read hardware clock and print result
       --set          set the rtc to the time given with --date
  -s | --hctosys      set the system time from the hardware clock
  -w | --systohc      set the hardware clock to the current system time
       --systz        set the system time based on the current timezone
       --adjust       adjust the rtc to account for systematic drift since
                      the clock was last set or adjusted
  -c | --compare      periodically compare the system clock with the CMOS clock
       --getepoch     print out the kernel's hardware clock epoch value
       --setepoch     set the kernel's hardware clock epoch value to the 
                      value given with --epoch
  -v | --version      print out the version of hwclock to stdout


Options: 
  -u | --utc          the hardware clock is kept in UTC
       --localtime    the hardware clock is kept in local time
  -f | --rtc=path     special /dev/... file to use instead of default
       --directisa    access the ISA bus directly instead of /dev/rtc
       --badyear      ignore rtc's year because the bios is broken
       --date         specifies the time to which to set the hardware clock
       --epoch=year   specifies the year which is the beginning of the 
                      hardware clock's epoch value
       --noadjfile    do not access /etc/adjtime. Requires the use of
                      either --utc or --localtime
       --adjfile=path specifies the path to the adjust file (default is
                      /etc/adjtime)
       --test         do everything except actually updating the hardware
                      clock or anything else
  -D | --debug        debug mode


hwclock takes no non-option arguments.  You supplied 1.
[wangshumin@centoshostnameKL1 ~]$ hwclock -w
Sorry, only the superuser can change the Hardware Clock.
[wangshumin@centoshostnameKL1 ~]$ sudo hwclock -w
[sudo] password for wangshumin: 
[wangshumin@centoshostnameKL1 ~]$ date
2018年 02月 11日 星期日 08:47:05 CST
[wangshumin@centoshostnameKL1 ~]$