……………………………完成mysql的安装。然后我们需要创建MySQL系统的启动键链接启动MySQL服务器，这样以便于MySQL在系统启动时自动启动。……………………………………………………………..为mysqlroot账户设置密码：Mysql_secure_installation[root@localhostlx]#mysql_secure_installationNOTE:RUNNINGALLPARTSOFTHISSCRIPTISRECOMMENDEDFORALLMySQLSERVERSINPRODUCTIONUSE!PLEASEREADEACHSTEPCAREFULLY!InordertologintoMySQLtosecureit,we'llneedthecurrentpasswordfortherootuser.Ifyou'vejustinstalledMySQL,andyouhaven'tsettherootpasswordyet,thepasswordwillbeblank,soyoushouldjustpressenterhere.Entercurrentpasswordforroot(enterfornone):OK,successfullyusedpassword,movingon...SettingtherootpasswordensuresthatnobodycanlogintotheMySQLrootuserwithouttheproperauthorisation.Setrootpassword?[Y/n]yNewpassword:Re-enternewpassword:Passwordupdatedsuccessfully!Reloadingprivilegetables.....Success!Bydefault,aMySQLinstallationhasananonymoususer,allowinganyonetologintoMySQLwithouthavingtohaveauseraccountcreatedforthem.Thisisintendedonlyfortesting,andtomaketheinstallationgoabitsmoother.Youshouldremovethembeforemovingintoaproductionenvironment.Removeanonymoususers?[Y/n]...Success!Normally,rootshouldonlybeallowedtoconnectfrom'localhost'.Thisensuresthatsomeonecannotguessattherootpasswordfromthenetwork.Disallowrootloginremotely?[Y/n]...Success!Bydefault,MySQLcomeswithadatabasenamed'test'thatanyonecanaccess.Thisisalsointendedonlyfortesting,andshouldberemovedbeforemovingintoaproductionenvironment.Removetestdatabaseandaccesstoit?[Y/n]-Droppingtestdatabase......Success!-Removingprivilegesontestdatabase......Success!Reloadingtheprivilegetableswillensurethatallchangesmadesofarwilltakeeffectimmediately.Reloadprivilegetablesnow?[Y/n]...Success!Cleaningup...Alldone!Ifyou'vecompletedalloftheabovesteps,yourMySQLinstallationshouldnowbesecure.ThanksforusingMySQL!创建成功。Apache2的是作为一个CentOS的软件包，因此我们可以直接用下面命令安装它：……………………安装成功。现在配置系统在引导时启动apache，第二步启动apache查看本地IP现在，在浏览器中输入本地IP地址，可以看到apache2的测试页，如下图：Apache的默认文档根目录是在CentOS上的/var/www/html目录，配置文件是/etc/httpd/conf