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Linux下的ORACLE安装，成功率99.99999%

kuuyee — Fri, 24 May 2013 04:27:00 GMT

相信很多童鞋都有过在Linux上安装Oracle数据库的痛苦经历，其中绝大多数都是环境设置的问题。我给大家推荐一个国外大牛写的Oracle的安装脚本 OTK，是用Bash写的，这东东大大简化了Oracle安装过程，而且成功率达到99.9999%以上，只要确保你的Linux系统是干净的，那么按照这个教程，保证你会安装成功。

准备工作

OTK针对各种Linux提供了安装文档，本文使用的RHEL5.5_x86_64位，数据库版本为11gR2，主要参考这个文档。

首先准备阿好如下的安装文件：

下载上述文件并放在/var/tmp/oracle目录下。最好要把你的YUM源指向你的系统安装光盘或者ISO文件。

安装OTK

用root登陆，执行如下命令：

# su - root 
# cd /var/tmp/oracle 
# ls -1 oratool* 
oratoolkit-1.0.2.1.5-1.noarch.rpm 
# rpm -ivh oratoolkit-1.0.2.1.5-1.noarch.rpm 
Preparing...                ########################################### [100%]
    1:oratoolkit             ########################################### [100%]

otk已经帮我们建立了oracle用户，下面需要设置Oracle用户密码

# passwd oracle 
Changing password for user oracle. 
New UNIX password: 
BAD PASSWORD: it is based on a dictionary word 
Retype new UNIX password: 
passwd: all authentication tokens updated successfully.

解决环境依赖

这一步最爽，最为头疼的环境依赖问题轻松就解决了！首先要验证下你的系统还差什么没有满足要求，OTK脚本提供了智能的环境是否满足检查:

# /opt/oracle/otk/current/bin/installManager swReqCheck osSetup11gR2.cfg 
...//省略大部分输出 
20130521_165122: Info: Action swReqCheck of installManager ended with 7 WARNINGS

最后的结论告诉你的系统共有几个警告（我的系统是7个），你可以在输出日志中查看到底缺了什么。下面的一组命令很酷，让你一下子解决所有的问题:

//先拼装命令 
# REQ_FILE_DIR="/opt/oracle/otk/current/conf/installManager/requirement" 
# REQ_FILE_PATH="$REQ_FILE_DIR/ora11gR2-redhat-5-x86_64.pkg.lst" 
# YUM_COMMAND=$(echo "yum install") 
# YUM_COMMAND+=$(egrep -v "#" $REQ_FILE_PATH | grep 32-bit | awk '{ print " "$1".i[356]86" }') 
# YUM_COMMAND+=$(egrep -v "#" $REQ_FILE_PATH | grep 64-bit | awk '{ print " "$1".x86_64" }')  

//用echo看看最终拼装的命令是什么样 
# echo $YUM_COMMAND  

//执行命令 
# $YUM_COMMAND  

//再次执行环境检查 
# /opt/oracle/otk/current/bin/installManager swReqCheck osSetup11gR2.cfg 
... 
20130521_170131: Info: Action swReqCheck of installManager ended successfully //这次验证成功了，环境已经满足Oracle安装要求

增强sqlplus

OTK提供了一个优化增强的sqlplus环境：

# cd /opt/oracle/otk/current/tools/rlwrap/ 
# ./configure 
# make 
# make install 
# /usr/local/bin/rlwrap -v 
rlwrap 0.30

使用installManager提取安装

切换到/opt/oracle/otk/current/conf/installManager目录，编辑osSetup11gR2.cfg来配置安装参数，包括内核参数、目录创建及所有授权等设置，如果你想默认安装就无需更改这个文件。

# cd /opt/oracle/otk/current/conf/installManager/ 
# vi osSetup11gR2.cfg 
# sdiff -s osSetup11gR2.cfg sample/osSetup11gR2.cfg //对比哪些参数修改过 
# /opt/oracle/otk/current/bin/installManager osSetup osSetup11gR2.cfg

把Oracle安装文件移入资源目录

otk默认读取oracle安装文件的目录是/var/opt/oracle/repository，otk的swInst实例安装命令会读取这个目录：

# cd /var/tmp/oracle 
# chown oracle:oinstall * 
# mv linux.x64_11gR2_database_1of2.zip linux.x64_11gR2_database_2of2.zip /var/opt/oracle/repository/

定制oracle用户登录的PS1变量

这一步没什么实际意义，就是定制Oracle用户登录的提示符。

# su - oracle
 ------------------------------------------------------  
 oraToolKit environment variables
 ------------------------------------------------------  
 Installation directory :   /opt/oracle/otk  
 Release                :   1.0.2.1.5  
 $RUN directory         :   /opt/oracle/otk/1.0/bin  
 $LOG_BASE directory    :   /var/opt/oracle/otk/1.0/log  
 ------------------------------------------------------  
:oracle@stquist1p:sidNotSet$ grep ^SITE .profile.custom.interactive 
SITE="" 
:oracle@stquist1p:sidNotSet$ vi .profile.custom.interactive 
:oracle@stquist1p:sidNotSet$ grep ^SITE .profile.custom.interactive 
SITE="KuuYee"//修改这一行，可以显示你喜欢的内容 
:oracle@stquist1p:sidNotSet$ exit 
# su - oracle 
KuuYee:oracle@stquist1p:sidNotSet$

安装Oracle数据库

OTK没有采用Oracle Universal Installer(OUI)，而是用swInst来控制整个安装过程的：

$ bash 
$ cd $INSTALL_CONF 
$ cp sample/swInstEeSrv11gR2-Step1-linux-x86_64.cfg . 
$ installManager swInst swInstEeSrv11gR2-Step1-linux-x86_64.cfg 
$ su - 
# /opt/oracle/eesrv/11.2.0/db1/root.sh
# exit

创建数据库实例

OTK采用dbSetup来创建实例，首先要进入$INSTALL_CONF目录配置实例参数

$ cd $INSTALL_CONF 
$ ls -1 dbSetup*.cfg 
dbSetup-dev.cfg 
dbSetup-prod.cfg 
dbSetup-test.cfg 
$ vi dbSetup-prod.cfg //prod为生产模式 
$ sdiff -s dbSetup-prod.cfg sample/dbSetup-prod.cfg 
DB_NAME="idm_test"                                            | DB_NAME="prod" 
ORACLE_HOME="$ORACLE_BASE/eesrv/11.2.0/db1"                   | ORACLE_HOME="$ORACLE_BASE/sesrv/11.1.0/db1" 
NLS_LANG=".AL32UTF8"                                          | NLS_LANG=".UTF8" 
SYSTEM_SIZE=1G                                                | SYSTEM_SIZE=512M 
TEMP_SIZE=2G                                                  | TEMP_SIZE=512M 
UNDO_SIZE=2G                                                  | UNDO_SIZE=512M 
USERS_SIZE=100M                                               | USERS_SIZE=10M 
LISTENER_PORT="1541"                                          | LISTENER_PORT="1531" 
MEMORY_TARGET=7G                                              | MEMORY_TARGET=512M 
MEMORY_MAX_TARGET=7G                                          | MEMORY_MAX_TARGET=512M 
SGA_TARGET=3G                                                 | SGA_TARGET=256M 
PROCESSES=1000                                                | PROCESSES=100 
$ installManager dbSetup dbSetup-prod.cfg //执行这部之前最好先配置下/etc/hosts文件，看下面说明

本文采用dbSetup-prod.cfg生产环境模式配置，我们看到还有dev(开发环境)和test(测试环境)，不过我没试过，有兴趣的童鞋可以试试。我在上面列出了我所作出的配置，原文并没有修改内存参数，我之所以修改是因为实际环境因为内存设置太小导致运行一段时间数据库经常挂掉，经过多次的调试而得到的经验值，这里需要说明下我的数据库配置：
OS：VMware虚拟机(RHEL5.5)
CPU：8核
内存：32G
硬盘：200GB
上面用sdiff -s dbSetup-prod.cfg sample/dbSetup-prod.cfg命令可以对比下我的参数修改，左面是我的修改参数，右面是原参数,需要特别说明的是第二个参数ORACLE_HOME，一定要自修修改，原来的参数是$ORACLE_BASE/sesrv/11.1.0/db1，要修改为$ORACLE_BASE/eesrv/11.2.0/db1，别改错了！

installManager dbSetup dbSetup-prod.cfg命令开始安装数据库实例，不过我建议你最好先配置下你的/etc/hosts文件，加入下面的内容：

127.0.0.1    你的hostname

接下来就是漫长的等待，大概需要几十分钟，具体根据你的机器配置情况。如果你最后看到如下的输出：

---------------------------------------------------------------------------------------------------- 
20130522_091856: Info: Executing libmiscellaneous.getFooter function 
20130522_091856: Info: Terminating installManager execution 
20130522_091856: Info: Summary log file:  /var/opt/oracle/otk/1.0/log-old/installManager/../installManager.log 
20130522_091856: Info: Detailed log file: /var/opt/oracle/otk/1.0/log-old/installManager/dbsetup-20130522_090349.log 
20130522_091856: Info: Action dbSetup of installManager ended successfully 
----------------------------------------------------------------------------------------------------

Congratulations！你安装成功了。

下面登陆试试：

Note	OTK默认创建了一个otk用户，密码也是otk， sys和system默认密码是manager

$ bash 
$ sourceProdEnv 
$ sqlplus sys/manager@idm_dev as sysdba; 
或者 
$ sqlplus otk/otk@idm_dev  

SQL*Plus: Release 11.2.0.1.0 Production on Wed May 22 11:05:16 2013  

Copyright (c) 1982, 2009, Oracle.  All rights reserved.   


Connected to: 
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production 
With the Partitioning, OLAP, Data Mining and Real Application Testing options  

SQL>

使用appctl管理oracle

OTK提供了一个ctl工具来帮我们管理Oracle实例：

$ ctl status all //查看当前状态 
$ ctl stop all   //停止数据库 
$ ctl start all  //启动数据库

使用backupuManager备份oracle

$ cd $BACKUP_CONF 
$ vi prod.cfg 
$ sdiff -s prod.cfg sample/prod.cfg DISK_DEVICE_MOUNT_POINT="/" | DISK_DEVICE_MOUNT_POINT="/backup01" 
$ backupManager full prod.cfg

定时备份Job

$ crontab -l|head -2 
# Example 1: Daily physical database backup 
# 0 2 * * * [ -d $HOME/../current ] && (ksh -c '. ./.profile >/dev/null; backupManager full .cfg .cfg .cfg >/dev/null') 
$ crontab -e 
$ crontab -l|head -2 
# Example 1: Daily physical database backup 
0 2 * * * [ -d $HOME/../current ] && (ksh -c '. ./.profile >/dev/null; backupManager full prod.cfg >/dev/null')

创建EM管理控制台

otk并没有帮我们创建EM控制台，对于习惯用Web管理的用户很不方便，我们需要手工创建：

$ emca -config dbcontrol db -repos recreate  

STARTED EMCA at May 22, 2013 11:18:41 AM 
EM Configuration Assistant, Version 11.2.0.0.2 Production 
Copyright (c) 2003, 2005, Oracle.  All rights reserved.  Enter the following information: 
Database SID: idm_dev //输入sid 
Listener port number: 1541 //监听输入端口 
Listener ORACLE_HOME [ /opt/oracle/eesrv/11.2.0/db1 ]: //默认回车 
Password for SYS user:  //输入密码manager 
Password for DBSNMP user:  //输入密码manager 
Password for SYSMAN user:  //输入密码manager 
Email address for notifications (optional): //默认回车 
Outgoing Mail (SMTP) server for notifications (optional): //默认回车 
-----------------------------------------------------------------  

You have specified the following settings  

Database ORACLE_HOME ................ /opt/oracle/eesrv/11.2.0/db1  

Local hostname ................ localhost.localdomain 
Listener ORACLE_HOME ................ /opt/oracle/eesrv/11.2.0/db1 
Listener port number ................ 1541 
Database SID ................ idm_dev 
Email address for notifications ............... 
Outgoing Mail (SMTP) server for notifications ...............  

----------------------------------------------------------------- 
Do you wish to continue? [yes(Y)/no(N)]: yes 
May 22, 2013 11:19:20 AM oracle.sysman.emcp.EMConfig perform 
INFO: This operation is being logged at /opt/oracle/cfgtoollogs/emca/idm_dev/emca_2013_05_22_11_18_40.log. 
May 22, 2013 11:19:21 AM oracle.sysman.emcp.EMReposConfig invoke 
INFO: Dropping the EM repository (this may take a while) ... 
May 22, 2013 11:19:23 AM oracle.sysman.emcp.EMReposConfig invoke 
INFO: Repository successfully dropped 
May 22, 2013 11:19:23 AM oracle.sysman.emcp.EMReposConfig createRepository 
INFO: Creating the EM repository (this may take a while) ... 
May 22, 2013 11:24:27 AM oracle.sysman.emcp.EMReposConfig invoke 
INFO: Repository successfully created 
May 22, 2013 11:24:30 AM oracle.sysman.emcp.EMReposConfig uploadConfigDataToRepository 
INFO: Uploading configuration data to EM repository (this may take a while) ... //可能会等一会 
May 22, 2013 11:25:19 AM oracle.sysman.emcp.EMReposConfig invoke 
INFO: Uploaded configuration data successfully 
May 22, 2013 11:25:23 AM oracle.sysman.emcp.util.DBControlUtil configureSoftwareLib 
INFO: Software library configured successfully. 
May 22, 2013 11:25:23 AM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary 
INFO: Deploying Provisioning archives ... 
May 22, 2013 11:25:45 AM oracle.sysman.emcp.EMDBPostConfig configureSoftwareLibrary 
INFO: Provisioning archives deployed successfully. 
May 22, 2013 11:25:45 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole 
INFO: Securing Database Control (this may take a while) ... 
May 22, 2013 11:25:58 AM oracle.sysman.emcp.util.DBControlUtil secureDBConsole 
INFO: Database Control secured successfully. 
May 22, 2013 11:25:58 AM oracle.sysman.emcp.util.DBControlUtil startOMS 
INFO: Starting Database Control (this may take a while) ... 
May 22, 2013 11:26:28 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration 
INFO: Database Control started successfully 
May 22, 2013 11:26:28 AM oracle.sysman.emcp.EMDBPostConfig performConfiguration 
INFO: >>>>>>>>>>> The Database Control URL is https://localhost.localdomain:1158/em <<<<<<<<<<< //这个是EM的访问链接 
May 22, 2013 11:26:31 AM oracle.sysman.emcp.EMDBPostConfig invoke 
WARNING: 
************************  WARNING  ************************  

Management Repository has been placed in secure mode wherein Enterprise Manager data will be encrypted.  The encryption key has been placed in the file: /opt/oracle/eesrv/11.2.0/db1/localhost.localdomain_idm_dev/sysman/config/emkey.ora.   Please ensure this file is backed up as the encrypted data will become unusable if this file is lost.  

*********************************************************** 
Enterprise Manager configuration completed successfully 
FINISHED EMCA at May 22, 2013 11:26:31 AM

OK！大功告成，相信各位童鞋都安装成功了，OTK的安装还是很稳健的，至少我安装了几十次都成功了！

最后祝各位童鞋好运！

2013-05-21

kuuyee 2013-05-24 12:27 发表评论

ORACLE数据库ORA-00257解决

kuuyee — Wed, 15 May 2013 02:13:00 GMT

今天数据库突然连不上了，报ORA-00257错误（空间不足错误），通过查找资料，绝大部分说这是由于Archivelog归档日志太多，占用了全部的硬盘剩余空间导致的，通过简单删除日志或加大存储空间就能够解决。

首先进入oracle用户，使用rman工具执行命令rman target/：

oracle@test-idm-db01$ rman target/  

Recovery Manager: Release 11.2.0.1.0 - Production on Wed May 15 09:29:06 2013  

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.  
RMAN-00571: =========================================================== 
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== 
RMAN-00571: =========================================================== 
RMAN-00554: initialization of internal recovery manager package failed 
RMAN-04005: error from target database: 
ORA-01031: insufficient privileges

竟然报错了，如果你的空间100%一点剩余都没有，那么就会报这个错，只能想办法让你的系统腾出一点空间，哪怕几百兆！然后重启数据库应该就可以登陆dba了。

重启数据库，再次rman

oracle@test-idm-db01$ rman target/  

Recovery Manager: Release 11.2.0.1.0 - Production on Wed May 15 09:29:40 2013  

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.  

connected to target database: IDM_TEST (DBID=4064060693)

现在删除Archivelog归档文件，执行下面的命令来删除最近7天的归档：

RMAN> DELETE ARCHIVELOG FROM TIME 'SYSDATE-7';

也可以只保留最近7天的，其余的都删除：

RMAN> DELETE ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-7';

但是过一段时间你的日志还是回满，对于开发环境这样的归档功能其实没什么必要，彻底解决办法是关闭这个功能，用dba登陆oracle：

sqlplus / as sysdba;

然后执行下面的命令：

SQL> alter database flashback off;

然后重启数据库就OK了！

2013-05-15

kuuyee 2013-05-15 10:13 发表评论

在RHEL5.5上安装PostgreSql92

kuuyee — Tue, 09 Apr 2013 07:55:00 GMT

RHEL5.5默认的源里没有postgresql9的包，需要下载源。下载地址：http://yum.postgresql.org/9.2/redhat/rhel-5-x86_64/pgdg-redhat92-9.2-7.noarch.rpm

然后安装源

rpm -ivh pgdg-redhat92-9.2-7.noarch.rpm

最后安装postgresql92

yum install postgresql92 postgresql92-server postgresql92-devel

初始化数据库

service postgresql-9.2 initdb Initializing database:                                     [  OK  ]

启动数据库

/etc/init.d/postgresql-9.2 start Starting postgresql-9.2 service:                           [  OK  ]

查看数据状态

netstat -nutlap | grep post tcp        0      0 127.0.0.1:5432              0.0.0.0:*                   LISTEN      21627/postmaster     udp        0      0 127.0.0.1:12823             127.0.0.1:12823             ESTABLISHED 21627/postmaster

kuuyee 2013-04-09 15:55 发表评论

ORACLE 11g在Linux下手工配置EM

kuuyee — Thu, 05 Apr 2012 03:08:00 GMT

使用OTK工具安装的Oracle默认没有配置EM，下面记录下配置和启动过程!

首先创建EM，执行下面的命令

$ emca -config dbcontrol db -repos recreate

我第一次运行报如下错误：

Mar 31, 2012 4:16:06 PM oracle.sysman.emcp.EMReposConfig createRepository
CONFIG: ORA-00604: error occurred at recursive SQL level 1
ORA-01653: unable to extend table SYS.SOURCE$ by 128 in tablespace SYSTEM
oracle.sysman.assistants.util.sqlEngine.SQLFatalErrorException: ORA-00604: error occurred at recursive SQL level 1
ORA-01653: unable to extend table SYS.SOURCE$ by 128 in tablespace SYSTEM
        at oracle.sysman.assistants.util.sqlEngine.SQLEngine.executeImpl(SQLEngine.java:1650)
        at oracle.sysman.assistants.util.sqlEngine.SQLEngine.executeScript(SQLEngine.java:1000)
        at oracle.sysman.assistants.util.sqlEngine.SQLPlusEngine.executeScript(SQLPlusEngine.java:339)
        at oracle.sysman.assistants.util.sqlEngine.SQLPlusEngine.executeScript(SQLPlusEngine.java:380)
        at oracle.sysman.emcp.EMReposConfig.createRepository(EMReposConfig.java:510)
        at oracle.sysman.emcp.EMReposConfig.invoke(EMReposConfig.java:228)
        at oracle.sysman.emcp.EMReposConfig.invoke(EMReposConfig.java:157)
        at oracle.sysman.emcp.EMConfig.perform(EMConfig.java:253)
        at oracle.sysman.emcp.EMConfigAssistant.invokeEMCA(EMConfigAssistant.java:589)
        at oracle.sysman.emcp.EMConfigAssistant.performConfiguration(EMConfigAssistant.java:1448)
        at oracle.sysman.emcp.EMConfigAssistant.statusMain(EMConfigAssistant.java:573)
        at oracle.sysman.emcp.EMConfigAssistant.main(EMConfigAssistant.java:521)
Mar 31, 2012 4:16:06 PM oracle.sysman.emcp.EMReposConfig invoke
SEVERE: Error creating the repository

解决办法

使用SYS用户登录sqlplus，然后执行下面的语句：

 SQL> SELECT * FROM DBA_DATA_FILES where TABLESPACE_NAME = 'SYSTEM'; 
FILE_NAME     FILE_ID TABLESPACE_NAME                    
 BYTES     BLOCKS STATUS  RELATIVE_FNO AUT   MAXBYTES  MAXBLOCKS INCREMENT_BY USER_BYTES USER_BLOCKS  
ONLINE_  /data01/rdbms/wcdb/datafile/wcdb_system_01.dbf          1 SYSTEM                          536870912      65536 AVAILABLE           
 1 NO           0          0            0  535822336       65408 
SYSTEM

然后新定义个空间文件wcdb_system_02.dbf，注意不要重名

然后新定义个空间文件*wcdb_system_02.dbf*，注意不要重名

SQL> ALTER TABLESPACE SYSTEM ADD DATAFILE '/data01/rdbms/wcdb/datafile/wcdb_system_02.dbf' SIZE 500M; Tablespace altered.

然后再次执行EM创建成功！

EM的访问地址：https://localhost:1158/em

删除一个EM资料库

$ emca -repos drop

配置数据库的 Database Control

$ emca -config dbcontrol db

删除数据库的 Database Control配置

$ emca -deconfig dbcontrol db

重新配置db control的端口，默认端口在1158

$ emca -reconfig ports $ emca -reconfig ports -dbcontrol_http_port 1160 $ emca -reconfig ports -agent_port 3940

先设置ORACLE_SID环境变量后,启动EM console服务

$ emctl start dbconsole

先设置 ORACLE_SID环境变量后,停止EM console服务

$ emctl stop dbconsole

先设置ORACLE_SID环境变量后,查看EM console服务的状态

$ emctl status dbconsole

kuuyee 2012-04-05 11:08 发表评论

JBoss AS7配置MySQL数据源

kuuyee — Tue, 19 Jul 2011 02:49:00 GMT

摘要: AS7默认的数据源是H2，虽然H2方便，但是一般的生产环境都是MySQL、ORACLE、SQLServer居多，本文描述如何在AS7配置MySQL数据源。阅读全文

kuuyee 2011-07-19 10:49 发表评论

开启Mysql远程访问

kuuyee — Wed, 22 Jul 2009 05:52:00 GMT

Mysql默认是不可以通过远程机器访问的,通过下面的配置可以开启远程访问.
我的Mysql环境是ubuntu+mysql5
1.修改/etc/mysql/my.conf,修改bind-address,指定为本机实际IP地址,你的my.con修改完大概是如下的样子

[mysqld]
#
# * Basic Settings
#
default-character-set=utf8
default-storage-engine=INNODB

bind-address    = 192.168.1.107

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
language        = /usr/share/mysql/english
skip-external-locking

2.用root登陆mysql执行如下命令

grant all on sonardb.* to sonar@'%' identified by '123456';
grant all on sonardb.* to sonar@localhost identified by '123456';

sonardb替换为你想访问的数据库名,sonar是你的想使用的用户名,123456替换为你的密码,这样就开启了远程访问功能.

kuuyee 2009-07-22 13:52 发表评论

Ubuntu下更改Mysql默认字符集

kuuyee — Wed, 22 Jul 2009 03:01:00 GMT

在ubuntu安装Mysql Server比较简单,一条命令就可以搞定,如下:

sudo apt-get install mysql-server

但是用apt-get安装mysql不能设置默认字符集,可能是我不明白怎么弄,安装完默认字符集是latin1,可以登录mysql后用status命令查看,显示内容如下:

root@ubuntu-vm:/home/kuuyee# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.0.51a-3ubuntu5.4 (Ubuntu)

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> status
--------------
mysql  Ver 14.12 Distrib 5.0.51a, for debian-linux-gnu (i486) using readline 5.2

Connection id:          4
Current database:
Current user:           root@localhost
SSL:                    Not in use
Current pager:          stdout
Using outfile:          ''
Using delimiter:        ;
Server version:         5.0.51a-3ubuntu5.4 (Ubuntu)
Protocol version:       10
Connection:             Localhost via UNIX socket
Server characterset:    latin1
Db     characterset:    latin1
Client characterset:    latin1
Conn.  characterset:    latin1
UNIX socket:            /var/run/mysqld/mysqld.sock
Uptime:                 16 hours 33 min 45 sec

Threads: 1  Questions: 10  Slow queries: 0  Opens: 12  Flush tables: 1  Open tables: 6  Queries per second avg: 0.000
--------------

解决办法就是更改/etc/mysql/my.cnf文件,在[mysqld]和[mysql]下添加如下内容:

[mysqld]
default-character-set=utf8
default-storage-engine=INNODB

[mysql]
default-character-set=utf8

然后重启mysql server即可,命令如下:

sudo /etc/init.d/mysql　restart

然后再查看一下status,呵呵!字符集变为utf-8了!

kuuyee 2009-07-22 11:01 发表评论

[转载]如何修改MYSQL的ROOT默认空密码

kuuyee — Fri, 19 Jun 2009 09:22:00 GMT

http://bbs.sinobuy.cn/index.php/topic,4296.0.html?PHPSESSID=25ea8175fd223dca364084582215d04b

cmd下切换到 mysql 安装目录
例
d:/mysql/bin
前提：mysql用户root密码为空.
输入 mysql -u root mysql
mysql> 状态下输入 update user set password=password('新密码') where user='root';
回显
Query OK, 0 rows affected (0.00 sec)
Rows matched: 2 Changed: 0 Warnings: 0
mysql> 状态下输入 FLUSH PRIVILEGES;
回显
Query OK, 0 rows affected (0.00 sec)
mysql> 状态下输入 quit
退出 sql

注意每个命令后都要加上一个分号 ";"
mysql 才开始执行该行命令
而第二个指令会让已载入记忆体的 mysql 系统资料库更新

重起 mysql .
在更新 root 密码后，以后要与 MySQL 连接的方法为：

mysql -u root -p 新密码

kuuyee 2009-06-19 17:22 发表评论