a. sudo apt-get autoremove --purge mysql-server*
b. sudo apt-get remove mysql-server
c. sudo apt-get autoremove mysql-server
d. sudo apt-get remove mysql-common (非常重要)

dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P

a. sudo apt-get install mysql-server
b. sudo apt-get install mysql-client
c. sudo apt-get install php5-mysql(安装php5-mysql是将php和mysql连接起来 )

service mysql start (启动mysql) 
service mysql stop  (关闭mysql) 
service mysql restart (重启mysql) 

mysql -u root -p 123456 (123456为自己设置的密码) 

show variables like '%character%'; 
[python] view plain copy
mysql> show variables like 'character%'; 
+--------------------------+----------------------------+ 
| Variable_name      | Value           | 
+--------------------------+----------------------------+ 
| character_set_client   | utf8            | 
| character_set_connection | utf8            | 
| character_set_database  | latin1           | 
| character_set_filesystem | binary           | 
| character_set_results  | utf8            | 
| character_set_server   | latin1           | 
| character_set_system   | utf8            | 
| character_sets_dir    | /usr/share/mysql/charsets/ | 
+--------------------------+----------------------------+ 

cd /etc/mysql/my.cnf (编码的修改上要注意自己的mysql版本和系统，有可能不同) 
sudo chmod 775 my.cnf 
sudo vim my.cnf 

[python] view plain copy
[mysqld] 
character-set-server=utf8