linux下搭建配置mysql数据库

1.添加用户组
[root@rhel5_A tmp]# groupadd mysql
[root@rhel5_A tmp]# useradd -g mysql -s /sbin/nologin -M mysql
2.编译安装
[root@rhel5_A tmp]# tar -zxvf mysql-5.1.49.tar.gz
[root@rhel5_A tmp]# cd mysql-5.1.49
[root@rhel5_A mysql-5.1.49]# autoreconf --force --install
[root@rhel5_A mysql-5.1.49]# libtoolize --automake --force
[root@rhel5_A mysql-5.1.49]# automake --force --add-missing
此三行是由于./configure 报错：“/bin/rm: cannot remove `libtoolT': No such file or directory”
[root@rhel5_A mysql-5.1.49]# ./configure --prefix=/usr/local/mysql --with-unix-socket-path=/usr/local/mysql/tmp/mysql.sock --with-charset=utf8 --with-extra-charsets=all --enable-assembler --enable-thread-safe-client
[root@rhel5_A mysql-5.1.49]# make
[root@rhel5_A mysql-5.1.49]# make install
[root@rhel5_A mysql-5.1.49]# cp /usr/local/mysql/share/mysql/my-medium.cnf /etc/my.cnf
配置文件,有large,medium,small三个环境下的,根据机器性能选择,如果负荷比较大,可修改里面的一些变量的内存使用值
[root@rhel5_A mysql-5.1.49]# chown -R mysql.mysql /usr/local/mysql/
[root@rhel5_A mysql-5.1.49]# /usr/local/mysql/bin/mysql_install_db --user=mysql 
3.添加服务  
[root@rhel5_A mysql-5.1.49]# cp /usr/local/mysql/share/mysql/mysql.server /etc/rc.d/init.d/mysqld
[root@rhel5_A mysql-5.1.49]# chmod 755 /etc/rc.d/init.d/mysqld
[root@rhel5_A mysql-5.1.49]# chkconfig --add mysqld
[root@rhel5_A mysql-5.1.49]# chkconfig  mysqld on
[root@rhel5_A mysql-5.1.49]# service mysqld start
4.安装后检测并修改root密码
[root@rhel5_A mysql-5.1.49]# /usr/local/mysql/bin/mysqladmin version
[root@rhel5_A mysql-5.1.49]# /usr/local/mysql/bin/mysqladmin ping
[root@rhel5_A mysql-5.1.49]# ln -s /usr/local/mysql/bin/mysql /usr/bin/
[root@rhel5_A mysql-5.1.49]# ln -s /usr/local/mysql/bin/mysqladmin /usr/bin/
设置root密码
[root@rhel5_A mysql-5.1.49]# mysqladmin -u root password "zhang"
配置mysql库文件搜索路径
[root@rhel5_A mysql-5.1.49]# echo "/usr/local/mysql/lib/mysql/" >>/etc/ld.so.conf 
[root@rhel5_A mysql-5.1.49]# ldconfig -v
5.清除空密码数据库用户，增加外部连接用户
[root@rhel5_A mysql-5.1.49]# mysql -u root -p
mysql> grant all privileges on *.* to zhang@'%' identified by '123456';
mysql> use mysql;
mysql> delete from user where password="";
mysql> exit；