Linux下卸载MySQL1、查找以前是否装有MySQL命令:rpm -qa|grep -i MySQL可以看到MySQL的两个包:MySQL-4.1.12-3.RHEL4.1
Linux下卸载MySQL
1、查找以前是否装有MySQL
命令:rpm -qa|grep -i MySQL
可以看到MySQL的两个包:
MySQL-4.1.12-3.RHEL4.1
MySQLclient10-3.23.58-4.RHEL4.1
2、删除MySQL
删除命令:rpm -e --nodeps 包名
( rpm -ev MySQL-4.1.12-3.RHEL4.1 )
3、删除老版本MySQL的开发头文件和库
命令:rm -fr /usr/lib/MySQL
rm -fr /usr/include/MySQL
注意:卸载后/var/lib/MySQL中的数据及/etc/my.cnf不会删除,如果确定没用后就手工删除
rm -f /etc/my.cnf
rm -fr /var/lib/MySQL
安装MySQL
安装前准备:两个rpm包
MySQL-client-5.1.20-0.glibc23.i386.rpm
MySQL-server-5.1.20-0.glibc23.i386.rpm
1、安装服务端:
命令:rpm -ivh MySQL-server-5.1.20-0.glibc23.i386.rpm
安装成功会出现....
warning: MySQL-server-5.1.20-0.glibc23.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
Preparing... ########################################### [100%]
1:MySQL-server ########################################### [100%]
080220 13:58:27 [Note] Plugin 'InnoDB' disabled by command line option
080220 13:58:28 [Note] Plugin 'InnoDB' disabled by command line option
PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:
/usr/bin/MySQLadmin -u root password 'new-password'
/usr/bin/MySQLadmin -u root -h localhost.localdomain password 'new-password'
See the manual for more instructions.
Please report any problems with the /usr/bin/MySQLbug script!
The latest information about MySQL is available on the web at
Support MySQL by buying support/licenses at
Starting MySQL.[ OK ]
2、安装客户端
命令:rpm -ivh MySQL-client-5.1.20-0.glibc23.i386.rpm
成功表现:
[root@localhost ~]# rpm -ivh MySQL-client-5.1.20-0.glibc23.i386.rpm
warning: MySQL-client-5.1.20-0.glibc23.i386.rpm: V3 DSA signature: NOKEY, key ID 5072e1f5
Preparing... ########################################### [100%]
1:MySQL-client ########################################### [100%]
3、登陆MySQL
登陆MySQL的命令是MySQL,MySQL 的使用语法如下:
MySQL [-u username] [-h host] [-p[password]] [dbname]
username 与 password 分别是 MySQL 的用户名与密码,MySQL的初始管理帐号是root,,没有密码,注意:这个root用户不是Linux的系统用户。MySQL默认用户是root,由于初始没有密码,第一次进时只需键入MySQL即可
[root@localhost ~]# MySQL
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.1.20-beta MySQL Community Server (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
MySQL>
出现了“MySQL>”提示符,恭喜你,安装成功!
增加了密码后的登录格式如下:
MySQL -u root -p
Enter password: (输入密码)
其中-u后跟的是用户名,-p要求输入密码,回车后在输入密码处输入密码。
注意:这个MySQL文件在/usr/bin目录下,与后面讲的启动文件/etc/init.d/MySQL不是一个文件。
补:
通过rpm包安装、配置及卸载MySQL的详细过程.
以MySQL-server-4.0.14-0.i386.rpm为例,放在/data目录下
cd /data
rpm -ivh MySQL-server-4.0.14-0.i386.rpm
安装完成后在/usr/share/MySQL目录中会有一个MySQL的启动脚本MySQL.server及示例配置文件等(如my-huge.cnf、my-large.cnf、my-medium.cnf)
拷贝一个示例配置文件作为MySQL的配置文件:
cp /usr/share/MySQL/my-medium.cnf /etc/my.cnf
rpm包安装完后自动将MySQL安装成系统服务,所以可以使用下面命令启动、停止MySQL

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