show variables like'%time_zone';
mysql> show variables like "%time_zone";
+------------------+--------+
| Variable_name  | Value |
+------------------+--------+
| system_time_zone | CEST  |
| time_zone    | SYSTEM |
+------------------+--------+

## 使用date命令
date +"%Z %z"　　　　//查看當(dāng)前操作系統(tǒng)的時(shí)區(qū)
date -R

[vagrant@localhost ~]$ date -R
Wed, 17 Jun 2020 10:48:14 +0200
[vagrant@localhost ~]$ date +"%Z %z"
CEST +0200

set global time_zone = '+8:00';
FLUSH PRIVILEGES;

mysql> show variables like "%time_zone";
+------------------+--------+
| Variable_name  | Value |
+------------------+--------+
| system_time_zone | CEST  |
| time_zone    | +08:00 |
+------------------+--------+

default-time_zone = '+8:00'

systemctl restart mysqld.service

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
default-time_zone = '+9:00'

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

# Recommended in standard MySQL setup
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid