迁移mysql数据库到linux遭遇这个报错：Variable ‘time_zone’ can’t be set to the value of ‘NULL’

解决办法：
修改mysql配置文件:

[mysqld]
max_allowed_packet=1024M

即可解决
linux的mysql配置文件在这里：

/etc/mysql/my.cnf

附这个配置不足的时候的各种报错：

ERROR 1231 ( 42000 ): Variable ' time_zone ' can ' t be set to the value of ' NULL ' 
ERROR 1231 (42000): Variable ' sql_mode ' can ' t be set  to the value of  ' NULL ' 
ERROR 1231 ( 42000 ): Variable ' foreign_key_checks ' can ' t be set to the value of ' NULL ' 
ERROR 1231 (42000): Variable 'unique_checks ' can ' t be set  to the value of  ' NULL ' 
ERROR 1231 ( 42000 ): Variable ' character_set_client ' can ' t be set to the value of ' NULL '
ERROR 1231 (42000): Variable ' collation_connection ' can ' t be set  to the value of  ' NULL ' 
ERROR 1231 ( 42000 ): Variable ' sql_notes ' can ' t be set to the value of ' NULL '