将xampp在centos下铐至/opt/lampp目录下时，/opt/lampp/lampp start启动时，出现如下问题：
XAMPP: SELinux is activated. Making XAMPP fit SELinux...
Starting XAMPP for Linux 1.7.1...
XAMPP: Starting Apache with SSL (and PHP5)...
XAMPP: Starting MySQL...
XAMPP: Couldn't start MySQL!
XAMPP: Starting ProFTPD...
XAMPP for Linux started.
先用下面的命令修改：
先关掉SElinux，然后再进行如下操作：
#chown -hR root /opt/lampp
# /opt/lampp/lampp start
# chmod 777 -R /opt/lampp/var
但又出现问题：
XAMPP: Starting MySQL…
Warning: World-writable config file ‘/opt/lampp/etc/my.cnf’ is ignored
Warning: World-writable config file ‘/opt/lampp/etc/my.cnf’ is ignored
最后又用如下命令，解决：
＃cd /opt/lampp/etc
#chmod 755 my.cnf
重启后正常！