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:0.015249s ]
SELECT * FROM `xn_keyword` WHERE `type` = 'sve' AND `type_resources` = 2 ORDER BY `sort` DESC [ RunTime:0.003143s ]
SHOW FULL COLUMNS FROM `xn_category` [ RunTime:0.015453s ]
SELECT * FROM `xn_category` ORDER BY `sort` ASC,`id` ASC [ RunTime:0.008232s ]
SELECT * FROM `xn_category` WHERE `type` = 1 AND `is_plan` = 1 ORDER BY `sort` ASC,`id` ASC [ RunTime:0.004860s ]
SELECT * FROM `xn_category` WHERE `type` = 1 ORDER BY `sort` ASC,`id` ASC [ RunTime:0.005491s ]
SELECT * FROM `xn_category` WHERE `type` = 2 ORDER BY `sort` ASC,`id` ASC [ RunTime:0.004311s ]
SHOW FULL COLUMNS FROM `xn_online` [ RunTime:0.015112s ]
SELECT * FROM `xn_online` WHERE `category_name` = 'sve' AND `type` = 1 ORDER BY `sort` DESC [ RunTime:0.002967s ]
SELECT * FROM `xn_online` WHERE `category_name` = 'sve' AND `type` = 2 ORDER BY `sort` DESC [ RunTime:0.002961s ]
SELECT * FROM `xn_online` WHERE `category_name` = 'sve' AND `type` = 3 LIMIT 1 [ RunTime:0.002865s ]
SHOW FULL COLUMNS FROM `xn_sve_category` [ RunTime:0.014933s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 0 AND `status` = 1 ORDER BY `sort` ASC [ RunTime:0.002943s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 46 [ RunTime:0.002879s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 61 [ RunTime:0.002879s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 62 [ RunTime:0.002871s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 68 [ RunTime:0.002880s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 63 [ RunTime:0.002896s ]
SELECT * FROM `xn_sve_category` WHERE `pid` = 49 [ RunTime:0.002881s ]
SELECT * FROM `xn_category` WHERE `type` = 1 AND `is_plan` = 1 AND `category_type` = 'sve' ORDER BY `sort` ASC,`id` ASC [ RunTime:0.004030s ]
SHOW FULL COLUMNS FROM `xn_footer` [ RunTime:0.015407s ]
SELECT * FROM `xn_footer` ORDER BY `sort` DESC [ RunTime:0.002988s ]
SELECT * FROM `xn_footer` WHERE `type` = 1 ORDER BY `sort` DESC [ RunTime:0.002940s ]
SELECT * FROM `xn_footer` WHERE `type` = 2 ORDER BY `sort` DESC [ RunTime:0.002935s ]
SHOW FULL COLUMNS FROM `xn_books` [ RunTime:0.022563s ]
SELECT * FROM `xn_books` WHERE `is_show` = 1 AND `id` = 1562 LIMIT 1 [ RunTime:0.003085s ]
SELECT * FROM `xn_books` WHERE `category_id` = 645 LIMIT 4 [ RunTime:0.012535s ]
SHOW FULL COLUMNS FROM `xn_main_banner` [ RunTime:0.015498s ]
SELECT * FROM `xn_main_banner` WHERE `category_id` = 261 ORDER BY `sort` DESC LIMIT 1 [ RunTime:0.003054s ]
SELECT * FROM `xn_main_banner` WHERE `category_id` = 260 ORDER BY `sort` DESC LIMIT 1 [ RunTime:0.003013s ]
SHOW FULL COLUMNS FROM `xn_download` [ RunTime:0.015583s ]
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:0.012313s ]
SHOW FULL COLUMNS FROM `xn_editor` [ RunTime:0.015269s ]
SELECT * FROM `xn_editor` WHERE `id` = 43 LIMIT 1 [ RunTime:0.002938s ]
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