1、mysql>show variables like 'character_set%';
显示如下：
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | latin1 |
| character_set_connection | latin1 |
| character_set_database | latin1 |
| character_set_filesystem | binary |
| character_set_results | latin1 |
| character_set_server | latin1 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
2、备份my.cnf cp /etc/my.cnf /etc/my.cnf.bak
3、修改my.cnf，结果如下
[client]
port=3306
socket=/var/lib/mysql/mysql.sock
default-character-set=utf8 [mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
character-set-server=utf8 [mysql]
no-auto-rehash
default-character-set=utf8 [mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
4、重启mysql服务 sudo service mysqld restart
5、mysql>show variables like 'character_set%';
进入mysql控制台后，执行以下命令
修改默认字符集
1.1修改服务器默认字符集
set character_set_server=utf8
1.2修改数据库字符集
set character_set_database=utf8;
1.3修改数据库客户端字符集
set character_set_client=utf8;
1.4修改连接默认字符集
set character_set_connection=utf8 修改已经存在库的字符集
2.1修改存在数据库的字符集
alter database mydb character set utf8;
2.2修改存在表的字符集
alter table mytable default character set utf8
结果如下：
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
6、其他一些常用命令
设置密码
use mysql;
update user set password=password('密码') where user='root';
flush privileges;
授权
grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;