[root@localhost /]# /opt/lampp/lampp restart
Stopping XAMPP for Linux 1.5.4a...
XAMPP: Stopping Apache with SSL...
XAMPP: Stopping MySQL...
XAMPP: XAMPP-ProFTPD is not running.
XAMPP stopped.
Starting XAMPP for Linux 1.5.4a...
XAMPP: Starting Apache with SSL (and PHP5)...
XAMPP: Starting MySQL...
XAMPP: Starting ProFTPD...
XAMPP:  - IPv4 getaddrinfo 'localhost.localdomain' error: Name or service not known
 - warning: unable to determine IP address of 'localhost.localdomain'
 - error: no valid servers configured
 - Fatal: error processing configuration file '/opt/lampp/etc/proftpd.conf'
XAMPP: Error 1! Couln't start ProFTPD!
XAMPP for Linux started.
[root@localhost /]#