CentOS6.7安装及配置mysql

一、安装mysql

1.官网下载rpm包

https://dev.mysql.com/downloads/mysql/5.5.html#downloads

 

wget https://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-server-5.5.62-1.el6.x86_64.rpm
wget https://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.62-1.el6.x86_64.rpm

2.安装mysql

rpm -ivh MySQL-server-5.5.62-1.el6.x86_64.rpm

 此处报错：

warning: MySQL-server-5.5.62-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
    libaio.so.1()(64bit) is needed by MySQL-server-5.5.62-1.el6.x86_64
    libaio.so.1(LIBAIO_0.1)(64bit) is needed by MySQL-server-5.5.62-1.el6.x86_64
    libaio.so.1(LIBAIO_0.4)(64bit) is needed by MySQL-server-5.5.62-1.el6.x86_64

>解决办法：libaio.so.1()(64bit) is needed by MySQL-server 问题解决办法<

yum install libaio

重新执行安装命令，成功。运行以下命令，验证：

rpm -qa | grep -i mysql

二、启动mysql服务

service mysql start

 此时出现错误：

[root@www ~]# service mysql start
Starting MySQL.Logging to '/var/lib/mysql/www.flytop.top.err'.
.. ERROR! The server quit without updating PID file (/var/lib/mysql/www.flytop.top.pid).

>解决办法：Starting MySQL.. ERROR! The server quit without updating PID file (/var/lib/mysql/localhost.localdom<

 mysql_install_db --user=mysql --ldata=/var/lib/mysql/

之后再启动，成功。

三、设置mysql开机自启

查看mysql是否开机自启

chkconfig --list | grep mysql 

不太懂这个是什么意思，网上的说法是3,4,5都是on，则已经是开机自启了，如果不是的话，可以执行下面的命令设置自启：

chkconfig --level 345 mysql on

四、修改mysql密码

在shell中执行

mysqladmin -u root password 'root123'

此处将密码设为root123，连接mysql，使用命令：

mysql -uroot -proot123

登录成功，密码修改成功。