1.yum install mysql -y

2.mysql -v

3.CREATE DATABASE openvpn;

4.USE openvpn;

5.

CREATE TABLE IF NOT EXISTS `user` (`username` char(32) COLLATE utf8_unicode_ci NOT NULL,`password` char(128) COLLATE utf8_unicode_ci DEFAULT NULL,`active` int(10) NOT NULL DEFAULT '1',`creation` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,`name` varchar(32) COLLATE utf8_unicode_ci NOT NULL,`email` char(128) COLLATE utf8_unicode_ci DEFAULT NULL,`note` text COLLATE utf8_unicode_ci,`quota_cycle` int(10) NOT NULL DEFAULT '30',`quota_bytes` bigint(20) NOT NULL DEFAULT '10737418240',`enabled` int(10) NOT NULL DEFAULT '1',PRIMARY KEY (`username`),KEY `idx_active` (`active`),KEY `idx_enabled` (`enabled`)
) DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

6.

CREATE TABLE IF NOT EXISTS `log` (`username` varchar(32) COLLATE utf8_unicode_ci NOT NULL,`start_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,`end_time` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',`trusted_ip` varchar(64) COLLATE utf8_unicode_ci DEFAULT NULL,`trusted_port` int(10) DEFAULT NULL,`protocol` varchar(16) COLLATE utf8_unicode_ci DEFAULT NULL,`remote_ip` varchar(64) COLLATE utf8_unicode_ci DEFAULT NULL,`remote_netmask` varchar(64) COLLATE utf8_unicode_ci DEFAULT NULL,`bytes_received` bigint(20) DEFAULT '0',`bytes_sent` bigint(20) DEFAULT '0',`status` int(10) NOT NULL DEFAULT '1',KEY `idx_username` (`username`),KEY `idx_start_time` (`start_time`),KEY `idx_end_time` (`end_time`)
) DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

7.wget http://ncu.dl.sourceforge.net/project/pam-mysql/pam-mysql/0.7RC1/pam_mysql-0.7RC1.tar.gz

8.tar -zxvf pam_mysql-0.7RC1.tar.gz

9. ./configure --with-mysql=/usr/share/mysql -with-pam-mods-dir=/lib/security

1.报错：checking for C++ compiler error: C++ compiler cannot create executables  运行：yum install gcc-c++

2.报错：configure: error: Cannot find pam headers. Please check if your system is ready for pam module development. 运行：yum install pam-devel

10. make && make install

1.报错：pam_mysql.c:4253: error: 'pam_mysql_ctx_t' has no member named 'verbose' 运行：yum install mysql-devel