Ubuntu中更改MySQL默认编码报错的解决

Ubuntu 12.04,安装了MySQL，完了之后，更改了字符编译，就报错。感觉很郁闷。

环境：

root@ubuntu:~# uname -a

Linux ubuntu 3.2.0-23-generic #36-Ubuntu SMP Tue Apr 10 20:39:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

使用的  apt-get install mysql-server安装的，然后改变了一下默认的字符集，在/etc/mysql/my.cnf里面的[mysqld]和[client]里加了
default-character-set=utf8，重启就不行了。

root@ubuntu:~# service mysql start

start: Job failed to start

看了系统日志，报了以下内容

Jun 11 22:56:42 ubuntu kernel: [ 4051.584941] init: mysql main process (4021) terminated with status 7

Jun 11 22:56:42 ubuntu kernel: [ 4051.584981] init: mysql main process ended, respawning

Jun 11 22:56:43 ubuntu kernel: [ 4052.134766] init: mysql post-start process (4022) terminated with status 1

Jun 11 22:56:43 ubuntu kernel: [ 4052.154739] type=1400 audit(1339469803.511:40): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=4068 comm="apparmor_parser"

Jun 11 22:56:44 ubuntu kernel: [ 4053.619246] init: mysql main process (4072) terminated with status 7

Jun 11 22:56:44 ubuntu kernel: [ 4053.619296] init: mysql main process ended, respawning

Jun 11 22:56:45 ubuntu kernel: [ 4054.248707] init: mysql post-start process (4073) terminated with status 1

Jun 11 22:56:45 ubuntu kernel: [ 4054.269778] type=1400 audit(1339469805.627:41): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=4119 comm="apparmor_parser"

Jun 11 22:56:47 ubuntu kernel: [ 4055.733347] init: mysql main process (4123) terminated with status 7

Jun 11 22:56:47 ubuntu kernel: [ 4055.733389] init: mysql respawning too fast, stopped

root@ubuntu:~#

URL：http://www.bianceng.cn/OS/Linux/201410/46058.htm

纠结了很长时间，今天无意中测试，意外解决了问题，呵呵，不得不说，RP爆发。

配置文件如下

root@ubuntu:/etc/mysql# cat /etc/mysql/my.cnf | grep -v '^#'
     
[client] 
default-character-set=utf8 #这里其实不用指定的，如果要指定，要用这个指令。
port            = 3306
socket          = /var/run/mysqld/mysqld.sock 
     
     
[mysqld_safe] 
socket          = /var/run/mysqld/mysqld.sock 
nice            = 0
     
[mysqld] 
character_set_server=utf8 #要使用这个命令，default-character-set=utf8会报错
user            = mysql 
pid-file        = /var/run/mysqld/mysqld.pid 
socket          = /var/run/mysqld/mysqld.sock 
port            = 3306
basedir         = /usr 
datadir         = /var/lib/mysql 
tmpdir          = /tmp 
lc-messages-dir = /usr/share/mysql 
skip-external-locking 
bind-address            = 127.0.0.1
key_buffer              = 16M 
max_allowed_packet      = 16M 
thread_stack            = 192K 
thread_cache_size       = 8
myisam-recover         = BACKUP 
query_cache_limit       = 1M 
query_cache_size        = 16M 
expire_logs_days        = 10
max_binlog_size         = 100M 
     
[mysqldump] 
quick 
quote-names 
max_allowed_packet      = 16M 
     
[mysql] 
     
[isamchk] 
key_buffer              = 16M 
     
!includedir /etc/mysql/conf.d/ 
root@ubuntu:/etc/mysql#

可以看出，在[client]和[myslqd]段中，设置字符编码使用的指令不一样。

然后重启mysql就可以了

root@ubuntu:/etc/mysql# service mysql restart 
mysql stop/waiting 
mysql start/running, process 6981
root@ubuntu:/etc/mysql# mysql -uroot -p 
Enter password:  
Welcome to the MySQL monitor.  Commands end with ; or g. 
Your MySQL connection id is 147
Server version: 5.5.22-0ubuntu1 (Ubuntu) 
     
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. 
     
Oracle is a registered trademark of Oracle Corporation and/or its 
affiliates. Other names may be trademarks of their respective 
owners. 
     
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. 
     
mysql> show variables like '%char%'; 
+--------------------------+----------------------------+ 
| 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/ | 
+--------------------------+----------------------------+ 
8 rows in set (0.00 sec)

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