解决无法修改日志时间的问题（Local time zone must be set--see zic manual page 2019 ）

故障现象

1. 系统日志时间晚了整整8个小时，比如现在是中午12点，日志时间为凌晨4点
2. date命令报错（Local time zone must be set--see zic manual page）

解决方案（失败）

1. 修改/etc/profile

   export TZ='Asia/Shanghai'

   无效，date命令显示正常，但是放在脚本中的date命令依然报错，并且日志时间依然延后8小时

2. tzselect配置

   #tzselect
   Please identify a location so that time zone rules can be set correctly.
   Please select a continent or ocean.
    ) Africa
    ) Americas
    ) Antarctica
    ) Arctic Ocean
    ) Asia
    ) Atlantic Ocean
    ) Australia
    ) Europe
    ) Indian Ocean
   ) Pacific Ocean
   ) none - I want to specify the time zone using the Posix TZ format.
   #?
   Please select a country.
    ) Afghanistan          ) Israel            ) Palestine
    ) Armenia          ) Japan            ) Philippines
    ) Azerbaijan          ) Jordan            ) Qatar
    ) Bahrain          ) Kazakhstan        ) Russia
    ) Bangladesh          ) Korea (North)        ) Saudi Arabia
    ) Bhutan          ) Korea (South)        ) Singapore
    ) Brunei          ) Kuwait            ) Sri Lanka
    ) Cambodia          ) Kyrgyzstan        ) Syria
    ) China          ) Laos            ) Taiwan
   ) Cyprus          ) Lebanon            ) Tajikistan
   ) East Timor          ) Macau            ) Thailand
   ) Georgia          ) Malaysia            ) Turkmenistan
   ) Hong Kong          ) Mongolia            ) United Arab Emirates
   ) India          ) Myanmar (Burma)        ) Uzbekistan
   ) Indonesia          ) Nepal            ) Vietnam
   ) Iran          ) Oman            ) Yemen
   ) Iraq          ) Pakistan
   #?
   Please select one of the following time zone regions.
   ) Beijing Time
   ) Xinjiang Time
   #? 
   
   The following information has been given:
   
       China
       Beijing Time
   
   Therefore TZ='Asia/Shanghai' will be used.
   Local time is now:    Wed Nov  :: CST .
   Universal Time is now:    Wed Nov  :: UTC .
   Is the above information OK?
   ) Yes
   ) No
   #? 
   
   You can make this change permanent for yourself by appending the line
       TZ='Asia/Shanghai'; export TZ
   to the file '.profile' in your home directory; then log out and log in again.
   
   Here is that TZ value again, this time on standard output so that you
   can use the /usr/bin/tzselect command in shell scripts:
   Asia/Shanghai
   [root@compute--: 2019年 11月 27日 星期三 :: Local time zone must be set--see zic manual page /root  ]
   #date
   2019年 11月 27日 星期三 :: Local time zone must be set--see zic manual page

   无效

3. /etc/localtime

   rm -f /etc/localtime
   cp  /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

   依然没有什么鸟用

最后网上看了一篇文章大概是说可能是升级libc.so.6导致，尝试以下方法总算成功了

解决方案（成功！）

#ll /usr/local/glibc-2.14/etc/
总用量
-rw-r--r--  root root  7月   : ld.so.cache
lrwxrwxrwx  root root    7月   : localtime -> ../share/zoneinfo/Factory
-rw-r--r--  root root  7月   : rpc

#cd /usr/local/glibc-2.14/etc/

#rm localtime
rm：是否删除符号链接 "localtime"？y

#ln -s /usr/local/glibc-2.14/share/zoneinfo/Asia/Shanghai localtime