Ondrej Sotolar's questions

In Ubuntu 20.04 in the GUI settings, printers - I get the message 'Sorry! The system printing service doesn't seem to be available'.

I have a Canon MF643Cdw printer on wi-fi. CUPS seems to be working fine (no errors in systemctl). I can even print the test page from localhost:631 using either no driver or the canon UFR 2 driver,

system-config-printer-gnome 1.5.12-0ubuntu1.1 is installed.

I've tried this solution to no avail. I've also tried purging and installing cups again with apt.

The canon printer utility can't find the printer in it's network IP address either.

Interestingly, lpinfo -m says: Bad file descriptor

Any help/advice is appreciated.

How can I encrypt an external device (i.e. USB keys, external hard-drives, memory sticks, etc.) so that it would subsequently be readable/writable on any computer that I plug it in?

For instance, it should then be possible to easily plug the encrypted device on a Linux, Windows, or OS X machine, and be able to access the contents without any fuss.

How can I do that?