CENTOS7 Modify the system time zone timezone & Modify the time zone after the JVM time zone is not updated

CENTOS7 Modify the system time zone timezone
Note: After modifying the time zone of the Linux system, installing JVM,JVM will use the system's time zone by default. If the system time zone is set incorrectly, after installing the JVM, modify the system's time zone, but the JVM's time zone remains unchanged unless you add the startup parameters for the JVM:-D user.timezone=gmt+08
Method 1:timedatectl Set-timezone Asia/shanghai # timedatectl warning:ignoring the TZ variable. Reading the system ' s time zone setting only.
      Local Time:mon 2016-11-21 01:52:42 EST   Universal Time:mon 2016-11-21 06:52:42 UTC   &N Bsp     RTC Time:mon 2016-11-21 06:52:42        time zone:america/new_york (EST, -0500)      NTP enabled:n/a NTP synchronized:no  rtc in local tz:no       DST Active:no  la St DST Change:dst ended at                   Sun 2016-11-06 01:59:59 EDT &nb Sp                 Sun 2016-11-06 01:00:00 EST  next DST CHANGE:DST begins (the Clock jumps one hour forward) at                   Sun 2017-03-12 01:59:59 E ST                   Sun 2017-03-12 03:00:00 EDT                    set time zone to CST (East 8 area) # timedatectl  set-timezone asia/shanghai warning:ignoring th e TZ variable.Reading the system ' s time zone setting only.
Local Time:mon 2016-11-21 14:52:59 CST Universal Time:mon 2016-11-21 06:52:59 UTC RTC Time:mon 2016-11-21 06: 52:59 Time Zone:asia/shanghai (CST, +0800) NTP enabled:n/a NTP synchronized:no RTC into local tz:no D ST active:n/a [Root@localhost ~]#
Method 2:tz the environment variable to modify the. Bash_profile in the user directory, append at the end of the file: tz= ' Asia/shanghai '; Export TZ Login After the launch, the date command can view the effect.