CentOS 6.*通过yum安装 MySQL-5.5

# Enable to use MySQL 5.5
[mysql55-community]
name=MySQL 5.5 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

# Enable to use MySQL 5.6
[mysql56-community]
name=MySQL 5.6 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

3.安装mysql-5.5

 yum install mysql-community-client mysql-community-devel mysql-community-server php-mysql

4.调整配置

编辑 /etc/my.cnf 文件

innodb_file_per_table=1 设置InnoDB为独立表空间模式，每个数据库的每个表都会生成一个数据目录
innodb_buffer_pool_size= 默认值：128M，设置为操作系统内存的70%-80%最佳
service mysqld start   启动mysql
chkconfig mysqld on    设为开机启动

mysqladmin -u root password ‘root‘   设置密码为root

CentOS 6.*通过yum安装 MySQL-5.5

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