我用的是Ubuntu14

輸入完以下命令

sudo apt-get update

sudo apt-get install apache2

sudo apt-get install mysql-server mysql-client

sudo apt-get install php5

sudo apt-get php5-mysql

還在apache2.conf最底加了ServerName localhost:80,其他都沒弄

再在瀏覽器輸入外網(wǎng)ip后出現(xiàn)Internal Server Error

求救啊啊????