I solved it. I apologize for my late reply.

So, I did now change to PHP and /usr/share, but still facing some problems: 1.: If I type <domain>/phpmyadmin nothing happens, if I type <domain>/phpmyadmin/index.php I get on the start page but no images are displayed, the whole site looks very buggy. Again the vh.json: 

{
"websites": [
{
"maintenance_mode": false,
"locations": [
{
"custom_conf_override": false,
"pattern": "/phpmyadmin/",
"custom_conf": "",
"path": "/usr/share",
"match": "exact",
"backend": {
"params": {
"pm_min": null,
"pm_max": null,
"php_open_basedir": "/usr/share"
},
"type": "php-fcgi"
}
}
],
"custom_conf": "",
"ssl_key_path": "",
"owner": "root",
"ssl_cert_path": "",
"name": "TITANWAR",
"enabled": true,
"extensions": {
"ajenti.plugins.vh.processes.ProcessesExtension": {
"processes": []
},
"ajenti.plugins.vh-mysql.mysql.MySQLExtension": {
"username": null,
"password": null,
"created": false,
"user": null,
"name": null
}
},
"domains": [
{
"domain": "titan-war.net"
}
],
"root": "/srv/titanwar",
"ports": [
{
"spdy": false,
"ssl": false,
"host": "*",
"port": 80,
"default": false
}
]
},
{
"maintenance_mode": true,
"locations": [],
"custom_conf": "",
"ssl_key_path": "",
"owner": "root",
"ssl_cert_path": "",
"name": "RECHSOFTWARE",
"enabled": true,
"extensions": {
"ajenti.plugins.vh.processes.ProcessesExtension": {
"processes": []
},
"ajenti.plugins.vh-mysql.mysql.MySQLExtension": {
"username": null,
"password": null,
"created": false,
"user": null,
"name": null
}
},
"domains": [
{
"domain": "rechsoftware.de"
}
],
"root": "/srv/rechsoftware",
"ports": [
{
"spdy": false,
"ssl": false,
"host": "*",
"port": 80,
"default": false
}
]
}
]
}

Still thanks for your support, and still answering my nooby questions :D.

Maybe I should add the comment that I want to access it over http://titan-war.net/phpmyadmin...

Hi, thanks for the really fast reply! My vh.json:

{
"websites": [
{
"maintenance_mode": false,
"locations": [
{
"custom_conf_override": false,
"pattern": "/phpmyadmin",
"custom_conf": "",
"path": "/usr/share/phpmyadmin/",
"match": "exact",
"backend": {
"params": {
"autoindex": false
},
"type": "static"
}
}
],
"custom_conf": "",
"ssl_key_path": "",
"owner": "root",
"ssl_cert_path": "",
"name": "TITANWAR",
"enabled": true,
"extensions": {
"ajenti.plugins.vh.processes.ProcessesExtension": {
"processes": []
},
"ajenti.plugins.vh-mysql.mysql.MySQLExtension": {
"username": null,
"password": null,
"created": false,
"user": null,
"name": null
}
},
"domains": [
{
"domain": "titan-war.net"
}
],
"root": "/srv/titanwar",
"ports": [
{
"spdy": false,
"ssl": false,
"host": "*",
"port": 80,
"default": false
}
]
},
{
"maintenance_mode": true,
"locations": [],
"custom_conf": "",
"ssl_key_path": "",
"owner": "root",
"ssl_cert_path": "",
"name": "RECHSOFTWARE",
"enabled": true,
"extensions": {
"ajenti.plugins.vh.processes.ProcessesExtension": {
"processes": []
},
"ajenti.plugins.vh-mysql.mysql.MySQLExtension": {
"username": null,
"password": null,
"created": false,
"user": null,
"name": null
}
},
"domains": [
{
"domain": "rechsoftware.de"
}
],
"root": "/srv/rechsoftware",
"ports": [
{
"spdy": false,
"ssl": false,
"host": "*",
"port": 80,
"default": false
}
]
}
]
}