一、ubuntu下MySQL的安装
在ubuntu命令行下输入 sudo apt-get install mysql-server 即可安装mysql服务，默认在安装mysql-server时，会自动安装好mysql-client。
同时安装好的mysql配置文件位置：/etc/mysql/my.cnf
启动mysql的快捷图标为：/etc/init.d/mysql
二、编码问题的解决
查看当前MYSQL字符集[在mysql命令行模式下执行]：show variables like 'character%';
更改编码：sudo vim /etc/mysql/my.cnf
找到[client] 添加如下两句:
//默认字符集为utf8
default-character-set=utf8
找到[mysqld] 添加添加如下四句:(注意每一行的前后都不能有空格)
//默认字符集为utf8
default-character-set=utf8
//设定连接mysql数据库时使用utf8编码，以让mysql数据库为utf8运行
init_connect='SET NAMES utf8'
最后切换到vim的末行模式下执行wq退出vim编辑器.
停止数据库服务：sudo /etc/init.d/mysql stop
重新启动： s udo /etc/init.d/mysql start
进入数据库： mysql -uroot -p(你的密码)
查看编码： show variables like '% character %';
此时应该就全是 utf8编码了。
三、 MySQL服务 加入开机自启动
加入开机自启动: sudo update-rc.d mysql defaults
从开机自启动中移出: sudo update-rc.d -f mysql remove
四、远程连接ubuntu下MySQL
vim /etc/mysql/my.cnf找到
bind-address = 127.0.0.1
这行，注释掉（如下）
#bind-address = 127.0.0.1
或者改为
bind-address = 0.0.0.0
允许任意IP访问，或者自己指定一个IP地址。
然后重启 MySQL
sudo /etc/init.d/mysql restart
授权用户能进行远程连接
grant all privileges on *.* to root@"%" identified by "password" with grant option;
flush privileges;
第一行命令解释如下，*.*：第一个*代表数据库名；第二个*代表表名。这里的意思是所有数据库里的所有表都授权给用户。root：授予root账号。 “%”：表示授权的用户IP可以指定，这里代表任意的IP地址都能访问MySQL数据库。“password”：分配账号对应的密码，这里密码自己替换成 你的mysql root帐号密码。
第二行命令是刷新权限信息，也即是让我们所作的设置马上生效。
此时再远程连接ubuntu下的MySQL应该能够连接上了
来自：http://blog.chinaunix.net/uid-22954746-id-2418833.html
# # The MySQL database server configuration file. # [client] port = 3306 socket = /var/run/mysqld/mysqld.sock default-character-set = utf8 # This was formally known as [safe_mysqld]. Both versions are currently parsed. [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] #My Features default-character-set = utf8 skip-name-resolve default-storage-engine = InnoDB default-table-type = InnoDB innodb_flush_log_at_trx_commit=0 federated #Master server-id = 1 log-bin=mysql-bin binlog-do-db=s3 binlog-ignore-db=mysql sync_binlog=1 auto_increment_increment=2 auto_increment_offset=1 #Slave skip-name-resolve slave-skip-errors log-slave-updates master-user=sync master-password=123456 master-port=3306 master-connect-retry=30 replicate-do-db=s3 relay-log=S3-DB-M-1-relay-bin # # * Basic Settings # user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. #bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer = 16M max_allowed_packet = 512M max_heap_table_size = 800M read_buffer_size = 1M read_rnd_buffer_size = 4M thread_stack = 192K thread_cache_size = 8 # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP #max_connections = 100 #table_cache = 64 #thread_concurrency = 10 # # * Query Cache Configuration # query_cache_limit = 1M query_cache_size = 16M # # * Logging and Replication # # Both location gets rotated by the cronjob. # Be aware that this log type is a performance killer. # As of 5.1 you can enable the log at runtime! #general_log_file = /var/log/mysql/mysql.log #general_log = 1 log_error = /var/log/mysql/error.log # Here you can see queries with especially long duration #log_slow_queries = /var/log/mysql/mysql-slow.log #long_query_time = 2 #log-queries-not-using-indexes # # The following can be used as easy to replay backup logs or for replication. # note: if you are setting up a replication slave, see README.Debian about # other settings you may need to change. #server-id = 1 #log_bin = /var/log/mysql/mysql-bin.log expire_logs_days = 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name [mysqldump] quick quote-names max_allowed_packet = 24M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M # # * IMPORTANT: Additional settings that can override those from this file! # The files must end with '.cnf', otherwise they'll be ignored. # !includedir /etc/mysql/conf.d/
如果你已经安装完毕并且运行过emma，程序就会创建 ～/.emma/emmarc文件，保存你自己的一些配置。
vim ～/.emma/emmarc
找到
db_encoding=latin1
改为
db_encoding=utf8
然后里，在执行所有的sql语句之前加入这条sql语句
set names utf8
按ctrl+enter执行之后，再看看是不是已经ok了。正常显示中文了
自动的执行“set names utf8” 语句。
ubuntu的apt-get 安装emma是在/usr/share/emma目录下面。
cd /usr/share/emma/emmalib
sudo vim __init__.py
找到
"db_encoding": "latin1"
改为
"db_encoding": "utf8"
保存退出。以后新创建的配置文件默认就会是utf8的解码了，我想在连接数据之后就执行 “set names utf8” 语句，所以
sudo vim /usr/share/emma/emmalib/mysql_host.py
跳到155行左右的_use_db(self, name, do_query=True)函数哪里,改成如下
def _use_db(self, name, do_query=True):
if self.current_db and name == self.current_db.name: return
if do_query:
self.query("use `%s`" % name, False)
self.query("set names utf8", False)
try:
self.current_db = self.databases[name]
except KeyError:
print "Warning: used an unknown database %r! please refresh host!\n%s" % (name, "".join(traceback.format_stack()))
自己看着改，反正改成上面的样子，注意空格，因为python是以空格当语句的分割语法的。
其实就是加了一句
self.query("set names utf8", False)
我机器上的就打不开然后：
self.query("set names utf8", False)
self.query("use `%s`" % name, False)
换了一下位子就ok了。