Welcome to the Community space, JP. Let me share information on creating companies and the availability of the Linux Operating system in QuickBooks.
Currently, QuickBooks Pro 2010 and 2023 are unavailable on the Linux server. However, you can Install the Linux Database Server Manager. This way, you can host and store your QuickBooks files.
On the other hand, yes you're correct. You can create or add more than one company file in QuickBooks Online (QBO). However, every company file needs its subscription by accessing them with the same sign-in info. With this, you can easily switch between your companies to efficiently manage everything.
Also, I've included a detailed resource about system requirements for QuickBooks, which may come in handy moving forward: System requirements.
I've also added an article that may help you to fix company file issues: Fix company files and network issues with QuickBooks File Doctor.
If you need anything else regarding QuickBooks, don't hesitate to click the Reply button in the comment section. We're always to lend a hand.
