Wait a moment. "tar commandline flags"? When I was still learning how to program, the general advice was to avoid memorizing things you can easily look up, like language syntax, framework functionality or commandline flags, and just let it happen. In fact, I recently caught myself skimming Nest.js docs to make cards to learn how to use Nest.js BEFORE I even start working on my project, and almost felt like I'm procrastinating instead of being productive.
I don't disagree with how Anki is effective at memorization, because that would be like disagreeing with the effectiveness of space repetition as a principle. I'm just wondering if it's worth putting stuff like "vim keybinds" in - John Carmack reportedly did that to check what's the fuss about Vim.