Takuya Yamamoto wrote:

Hello

https://www.centos.org/legal/trademarks/

According to above, I found following message.

Notwithstanding anything to the contrary provided in these Guidelines, the following are examples of unacceptable uses:

1.Use of the CentOS Marks in connection with commercial redistribution of CentOS software

I have a question. What means "Use of the CentOS Marks"?

For example, While CentOS is booting up, CentOS show the CentOS logo on Full screen. Is it unacceptable? Or acceptable? If commercial redistribution of CentOS software, Developer have to hide this logo?

For example, CentOS System is working, user can show the "CentOS" text words on console. Is it unacceptable? Or acceptable?

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Yamamoto Takuya

Hello,

I'll try to answer this for you, however please note I am not a lawyer and do not hold an authoritative position of the CentOS distribution. I am just a regular user like you.

I'm fairly certain in most cases that using CentOS and its trademarks are perfectly acceptable and allowed for example if you are doing the two options above.

However, you will run into a problem if you modify CentOS Sources, for example making a derivative distribution (like CentOS is to RHEL) then tried to call it "CentOS Scientific Linux" and tried to sell it as your own work. In this case you would have to rebrand to "Scientific Linux" and cannot (legally) use the CentOS trademarks in this case.

This is also for the same reason CentOS is called "Community Enterprise Operating System" instead of "Red Hat Enterprise Linux Community Edition".

So if you had plans to remake or alter CentOS in major ways (Source code editing) to redistribute as your own work, you cannot call it CentOS.

However, if you are for example working for a commercial employer you are free to install, setup, configure and run CentOS on any commercial or non-commercial machine at any time without risk of breaking the trademark rules.

In the case that you need additional software included with your installation media then a self-made repository is probably the best option as you can legally include a "kickstart"[1] file with your installation media to include the extra repository and install the extra software.

I hope this is able to answer your question.

[1] https://github.com/rhinstaller/pykickstart/blob/master/docs/kickstart-docs.r...

Kind Regards, Jake Shipton