Xampp on Ubuntu maverick 10.10 64 bit

* downloaded development package and stable package
* extracted to /opt

sudo /opt/lampp/lampp start 

causes mysql was not started with following error in /opt/lampp/var/mysql/copmuter.err

101106 20:18:59 mysqld_safe Starting mysqld daemon with databases from /opt/lampp/var/mysql

101106 20:18:59 [Note] Plugin 'FEDERATED' is disabled.

/opt/lampp/sbin/mysqld: Can't find file: './mysql/plugin.frm' (errno: 13)

101106 20:18:59 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

101106 20:18:59  InnoDB: Operating system error number 13 in a file operation.

InnoDB: The error means mysqld does not have the access rights to

InnoDB: the directory.

InnoDB: File name /opt/lampp/var/mysql/ibdata1

InnoDB: File operation call: 'create'.

InnoDB: Cannot continue operation.

101106 20:18:59 mysqld_safe mysqld from pid file /opt/lampp/var/mysql/ms-HP-620.pid ended 

following helped:

 sudo chown -R nobody /opt/lampp/var/mysql