In my case I write down short tutorials for everything I used, and keep it as private repo on Github.
There are thousands of lines, when I need something I consult my repo for instructions.
There are 1600 terminal commands in my arsenal for use.
I suggest you do the same to become Bruce Lee of the terminal.
Trying to remember everything is hard and takes years of practice.
They aren’t codes.. but commands. As for recalling them, the letters generally give you a hint as to what a command does. in the case of dpkg and dpkg-query the pkg refers to ‘package’. That’s the hint. If you use these command for a while it becomes second nature.
Grep is another command (global regular expression print) It filters text and only returns the strings you are looking for. If you try the command I suggested- dpkg-query -L plasma-workspace |grep klipper but remove the “|grep klipper” you’ll see every file contained in plasma-workspace rather than those dealing with klipper.
And I forgot to mention, you can configure klipper by right clicking on the icon and choosing configure clipboard.. That will bring up the configuration menu.