1、下载tar.gz，解压到/usr/local/mysql
2、设置环境变量
vim /etc/profile
export PATH=/usr/local/mysql/bin:/usr/local/mysql/lib:$PATH
source /etc/profile
3、初始化设置
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
（会出错，可将 安装目录/mysql/data下的文件全部删除）
4、将mysql设置成系统服务
cd /usr/local/mysql
cp support-files/mysql.server /etc/init.d/mysqld
chmod a+x /etc/init.d/mysqld
chkconfig --add mysqld
chkconfig mysqld on
chkconfig --list | grep mysqld
5、编辑配置文件
vim /etc/my.cnf
###########################################
[mysqld]
datadir=/usr/local/mysql/data
socket=/usr/local/mysql/mysql.sock
[mysqld_safe]
log-error=/usr/local/mysql/logs/mysqld.log
pid-file=/usr/local/mysql/pids/mysqld.pid
symbolic-links=0
[client]
default-character-set=utf8
socket=/usr/local/mysql/mysql.sock
[mysql]
default-character-set=utf8
socket=/usr/local/mysql/mysql.sock
!includedir /etc/my.cnf.d
############################################
7、创建相关文件和目录
mkdir -p /var/lib/mysql/
mkdir -p /etc/my.cnf.d/
touch /usr/local/mysql/logs/mysqld.log
touch /usr/local/mysql/pids/mysqld.pid
chown mysql.mysql -R /usr/local/mysql/
8、开启服务&查看服务状态
service mysqld start
service mysqld status
无密码的状态可以直接以mysql命令进入mysql的交互界面
mysql
9、给mysql设置root密码
mysqladmin -u root password “root”
使用密码登录
mysql -uroot –p
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