Info: I have several boxes that primarily run BOINC. They are all Linux Mint boxes. ONE of them reports to the project servers that it is Ubuntu:

Operating system:
Linux Ubuntu Ubuntu 24.04.2 LTS [6.14.0-27-generic|libc 2.39]

All others report correct OS:

Operating system:
Linux Linuxmint Linux Mint 22.1 [6.14.0-27-generic|libc 2.39]

Any thoughts on where to start looking for this odd occurrence?

Thanx, Skip

PS: BOINC client version: 8.0.4

Mint is a customised distribution of Ubuntu.

Yes, it's based on Ubuntu LTS but 8 other Mint boxes report OS as Mint.

BOINC's source code lists the following sources to read the Linux OS information from:
// functions for getting Linux OS and version from various sources
// (lsb_release -a, /etc/os-release, /etc/redhat-release)

Since "lsb_release" is not always installed "/etc/os-release" becomes the main source on most Linux systems.
That file is written by the OS.
You can check it's content running:
cat /etc/os-release

More details:
https://www.freedesktop.org/software/systemd/man/latest/os-release.html

In reply to computezrmle's message of 1 Aug 2025:

BOINC's source code lists the following sources to read the Linux OS information from:
// functions for getting Linux OS and version from various sources
// (lsb_release -a, /etc/os-release, /etc/redhat-release)

Since "lsb_release" is not always installed "/etc/os-release" becomes the main source on most Linux systems.
That file is written by the OS.
You can check it's content running:
cat /etc/os-release

More details:
https://www.freedesktop.org/software/systemd/man/latest/os-release.html

Thanx. Mint uses the /etc/os-release which is really a link to /usr/lib/os-release.

It looks like this fixed it

sudo apt install --reinstall base-files

I found one other person that had this problem and it came about in a v22 to v22.1 upgrade... which is also the route my problem child took.
Again thanx for getting me on the path, Skip