本教材以目前流行的RedHat公司的Red
Hat Enterprise Linux 7(RHEL 7)为例,介绍了Linux的系统管理和网络服务两大方面的内容。其中,系统管理部分包括：RHEL 7的安装与登录、RHEL 7的图形和字符界面的使用基础、文件和目录的管理、用户与文件权限的管理、基本磁盘和逻辑卷的管理、软件包管理、服务和进程的管理、网络配置与Firewalld防火墙管理、NFS与Samba资源共享的管理。网络服务部分包括：DHCP、DNS、Web、MariaDB数据库、FTP、电子邮件等常用网络服务器的搭建。
SHOW FULL COLUMNS FROM `xn_keyword` [ RunTime:0.023432s ]
SELECT * FROM `xn_keyword` WHERE `type` = 'sve' AND `type_resources` = 2 ORDER BY `sort` DESC [ RunTime:0.002887s ]
SHOW FULL COLUMNS FROM `xn_category` [ RunTime:0.023633s ]
SELECT * FROM `xn_category` ORDER BY `sort` ASC,`id` ASC [ RunTime:0.008857s ]
SELECT * FROM `xn_category` WHERE `type` = 1 AND `is_plan` = 1 ORDER BY `sort` ASC,`id` ASC [ RunTime:0.004412s ]
SELECT * FROM `xn_category` WHERE `type` = 1 ORDER BY `sort` ASC,`id` ASC [ RunTime:0.007264s ]
SELECT * FROM `xn_category` WHERE `type` = 2 ORDER BY `sort` ASC,`id` ASC [ RunTime:0.005032s ]
SHOW FULL COLUMNS FROM `xn_online` [ RunTime:0.066128s ]
SELECT * FROM `xn_online` WHERE `category_name` = 'sve' AND `type` = 1 ORDER BY `sort` DESC [ RunTime:0.002748s ]
SELECT * FROM `xn_online` WHERE `category_name` = 'sve' AND `type` = 2 ORDER BY `sort` DESC [ RunTime:0.002860s ]
SELECT * FROM `xn_online` WHERE `category_name` = 'sve' AND `type` = 3 LIMIT 1 [ RunTime:0.002714s ]
SHOW FULL COLUMNS FROM `xn_sve_category` [ RunTime:0.064625s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 0 AND `status` = 1 ORDER BY `sort` ASC [ RunTime:0.010347s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 46 [ RunTime:0.003050s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 61 [ RunTime:0.003172s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 62 [ RunTime:0.002653s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 68 [ RunTime:0.002990s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 63 [ RunTime:0.002675s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 49 [ RunTime:0.002660s ]
SELECT * FROM `xn_category` WHERE `type` = 1 AND `is_plan` = 1 AND `category_type` = 'sve' ORDER BY `sort` ASC,`id` ASC [ RunTime:0.004592s ]
SHOW FULL COLUMNS FROM `xn_footer` [ RunTime:0.024087s ]
SELECT * FROM `xn_footer` ORDER BY `sort` DESC [ RunTime:0.002806s ]
SELECT * FROM `xn_footer` WHERE `type` = 1 ORDER BY `sort` DESC [ RunTime:0.002670s ]
SELECT * FROM `xn_footer` WHERE `type` = 2 ORDER BY `sort` DESC [ RunTime:0.002620s ]
SHOW FULL COLUMNS FROM `xn_books` [ RunTime:0.021226s ]
SELECT * FROM `xn_books` WHERE `id` = 1562 LIMIT 1 [ RunTime:0.002878s ]
SELECT * FROM `xn_books` WHERE `category_id` = 645 LIMIT 4 [ RunTime:0.013437s ]
SHOW FULL COLUMNS FROM `xn_main_banner` [ RunTime:0.020277s ]
SELECT * FROM `xn_main_banner` WHERE `category_id` = 261 ORDER BY `sort` DESC LIMIT 1 [ RunTime:0.002731s ]
SELECT * FROM `xn_main_banner` WHERE `category_id` = 260 ORDER BY `sort` DESC LIMIT 1 [ RunTime:0.002730s ]
SHOW FULL COLUMNS FROM `xn_download` [ RunTime:0.023735s ]
SELECT `d`.*,c.title as category_name FROM `xn_download` `d` INNER JOIN `xn_category` `c` ON `c`.`id`=`d`.`category_id` WHERE `d`.`book_id` = '1562' [ RunTime:0.028660s ]
SHOW FULL COLUMNS FROM `xn_editor` [ RunTime:0.022171s ]
SELECT * FROM `xn_editor` WHERE `id` = 43 LIMIT 1 [ RunTime:0.002762s ]
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