# tar zxvf mariadb-5.5.31-linux-x86_64.tar.gz 
# mv mariadb-5.5.31-linux-x86_64 /usr/local/MySQL （必需这样，很多脚本或可执行程序都会直接访问这个目录）
# groupadd mysql 增加 mysql 属组 
# useradd -g mysql mysql 增加 mysql 用户 并归于mysql 属组 
# chown mysql:mysql -Rf /usr/local/mysql 设置 mysql 目录的用户及用户组归属。 
# chmod +x -Rf /usr/local/mysql 赐予可执行权限 
# cp /usr/local/mysql/support-files/my-medium.cnf /etc/my.cnf 复制默认mysql配置 文件到/etc 目录 
# /usr/local/mysql/scripts/mysql_install_db --user=mysql 初始化数据 库 
# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql 复制mysql服务程序 到系统 目录 
# chkconfig mysql on 添加mysql 至系统服务并设置为开机启动 
# service mysql start 启动mysql
#vim /etc/profile 编辑profile,将mysql的可执行路径加入系统PATH
export PATH=/usr/local/mysql/bin:$PATH 
#source /etc/profile 使PATH生效。
#mysqladmin -u root password 'yourrootpassword' 设定root账号及密码
#mysql -uroot -p 使用root用户登录mysql
[none]>use mysql 切换至mysql数据库。
[mysql]>select user,host,password from user; --查看系统权限
[mysql]>drop user ''@'localhost'; --删除不安全的账户
[mysql]>drop user root@'::1';
[mysql]>drop user root@127.0.0.1;

#vi /etc/my.cnf

#vi /etc/my.cnf

log-error = /usr/local/mysql/log/error.log
general-log-file = /usr/local/mysql/log/mysql.log

#vi /etc/my.cnf

lower_case_table_name=1

FATALERROR:Couldnotfind./bin/my_print_defaults
If you are using a binary release, you must run this script from
within the directory the archive extracted into. If you compiled
MySQL yourself you must run 'make install' first.

[root@bogon scripts]# /usr/local/mysql/scripts/mysql_install_db --user=mysql&
[1] 16874
[root@bogon scripts]#
FATAL ERROR: Could not find ./bin/my_print_defaults
If you compiled from source, you need to run 'make install' to
copy the software into the correct location ready for operation.
If you are using a binary release, you must either be at the top
level of the extracted archive, or pass the --basedir option
pointing to that location.

[root@bogon scripts]# /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data &(这点非常重要)

[root@zrf ~]# /usr/local/mysql/bin/mysqld_safe --user=mysql&
[1] 3527
[root@zrf ~]# 101021 16:37:39 mysqld_safe Logging to '/usr/local/mysql/data/zrf.err'.
101021 16:37:39 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data
101021 16:37:39 mysqld_safe mysqld from pid file /usr/local/mysql/data/zrf.pid ended

/usr/local/mysql/libexec/mysqld: Table 'mysql.plugin' doesn't exist

# /usr/local/mysql/bin/mysql_install_db --user=mysql