自己搭建的lnmp环境，为什么安装discuz跟dedecms都出现500错误

500是系统错误 肯定没有安装好了 随便做个测试页面 看看

是不是PHP文件的权限设置问题？
你Nginx的日志拿上来看看

500，看下错误日志吧。

可能是你搭的环境有问题，建议你直接更换免费的php镜像，那里是给你配好环境的
http://market.aliyun.com/imageproduct/16-122106003.html?spm=0.0.0.0.bAwzhI

反正现在你也没有数据，控制台直接更换系统就可以选择了，很方便

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[Wed Aug 27 14:24:19 2014] [error] [client 116.226.235.1] PHP Warning:  require(): open_basedir restriction in effect. File(/var/www/html/upload/source/discuz_    

vers    ion.php) is not within the allowed path(s): (.:/tmp/) in /var/www/html/upload/install/index.php on line 23
[Wed Aug 27 14:24:19 2014] [error] [client 116.226.235.1] PHP Warning:  require(/var/www/html/upload/source/discuz_version.php): failed to open stream: Operati    on

n    ot permitted in /var/www/html/upload/install/index.php on line 23ion.php) is not within the allowed path(s): (.:/tmp/) in /var/www/html/upload/install/inde    

x.php on line 23
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换apache了