Roon server cannot run on linux mint 20

[Xavier_GUERIN]

Core Machine (Operating system/System info/Roon build number)
LINUXMINT 20

Network Details (Including networking gear model/manufacturer and if on WiFi/Ethernet)
Ethernet and WiFi.

Audio Devices (Specify what device you’re using and its connection type - USB/HDMI/etc.)

Description Of Issue
Roon core can not be found.

Here is result of check.sh

Checking to see if RoonBridge can run on this machine 

    Checking for Binary Compatibility                            [   OK   ]
    Checking for ALSA Libraries                                  [   OK   ]

STATUS: SUCCESS

results of start.sh
Warn:  get lock file path: /tmp/.rnbgem1000-
Warn:  get lock file path: /tmp/.rnbgem1000-
Warn:  get lock file path: /tmp/.rnbgem1000-
00:00:00.002 Warn:  get lock file path: /tmp/.rnbgem1000-
00:00:00.051 Trace: [childprocess] using unix child process
Initializing
00:00:00.082 Info:  Starting /opt/RoonBridge/Bridge/RoonBridgeHelper
00:00:00.090 Info:  ConnectOrStartAndWaitForExit RAATServer, path: /opt/RoonBridge/Bridge/RAATServer
Not Running (.o)
00:00:00.004 Warn:  get lock file path: /tmp/.rnbhgem1000-
Running

I cannot connect to Roon.

Any solution please?
Thanks

[Martin_Webster]

Roon Server, which is a headless instance, runs as a service (systemd) so you’re getting the lock warnings because Roon is running. There is no need to run Roon Server and Roon Bridge on the same machine. Please post the output from …

sudo systemctl status roonserver.service

Also, are you running a firewall? Or expecting a GUI on Linux?

[Xavier_GUERIN]

Thank you Martin.
Problem solved.