I figured out how to disable the internet by unplugging from the router. Now I want to change my Brother printer to offline before I print. This is for security reasons.I have linux mint.

In the pre-CUPS era, you'd do this with "lpc" (line printer control) which you could use to disable printing (print files would queue up waiting for the print queue to be re-enabled) or disable queueing altogether (print jobs would be rejected outright).

Now... with CUPS, "lpc" barely does anything other than show queue status. Point a browser to localhost:631 and you can access all the good features that "lpc" used to provide. Once you're at the main CUPS page, click on:

Printers (on the top menu bar) -> your-print-queue-name -> Maintenance

From the drop-down menu that appears you'll want either "Pause printer" or "Reject jobs". I find this too pointy-clicky but, alas, it's "The CUPS Way[tm]". Not running a GUI? You can accomplish the same using "lynx" or some other text-oriented browser (navigation takes some practice, though).

HTH...

That would be in the settings on the Brother printer. If the printer is wifi-enabled, you can disable that in the settings. That's the only place I know of for disabling wifi on the printer. If you want to disable all wifi for everything, just turn the router off, that disables the internet completely. I'm not sure what security you're concerned about, but one of those will disable all internet access.

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