Symptoms

Parallels Plesk Panel version 8.6 is running on Ubuntu/Debian operating system.

Samba Fileserver is shown as stopped in Parallels Plesk Panel on page {Modules -> Samba Fileserver Configuration} and it cannot be started with option {Switch On}.
Also its status is shown as stopped with Plesk CLI:


and error "Unknown OS release number" is generated when try to start the service:


Why?

Resolution

This is a known issue for installation of Parallels Plesk Panel installed on Debian/Ubuntu: status of Samba Fileserver is always shown as "stopped".
The problem has been fixed in Parallels Plesk Panel since version 9.0.0.

Hotfix for Parallels Plesk Panel version 8.6 for Debian4.0 i586/x86_64 and Ubuntu6.06 32bit is attached.

To install it you should download archive filesrvmng.tgz from the attachment and unpack it with tar -zxf. In resulted directory find file filesrvmng for your operating system and replace existent file /opt/psa/admin/sbin/modules/fileserver/filesrvmng with it. Do not forget to backup old file filesrvmng.
Verify and correct permissions, it should be root:psaadm, 550. You may correct permissions with commands chown and chmod:



The hotfix does nothing with notification "Unknown OS release number". It is still shown when try to start the service with "filesrvmng --start". The notification is specific for Debian/Ubuntu and does not affect normal functionality of the service.