直击Linux：12问
1.什么是Linux？
Linux是一个诞生于网络、成长于网络且成熟于网络的奇特的操作系统。-Live Linux: 12 question one. What is Linux? Linux is a birth in the network, grew up in the network and the maturity of the peculiar network operating system.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001195s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.104966s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000986s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001277s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001056s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003183s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000985s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003724s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015691s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002222s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 116207 [ RunTime:0.027225s ]
