If and how to remove KDE plasma

[titan]

I have an old laptop which is really just my backup for when things go wrong ( like recent grub issue) It is running fully DUed plasma but it is slow. So I have installed i3 which I used as my main desktop some years ago. I was intending to remove KDE but will it actually make any difference to the performance since the main KDE desktop is not running. If I do decide to remove KDE what is the best way to do it.

[rueX]

first of all
have a look - what U need:

apt-cache depends kde-standard
apt-cache depends kde-full

okular,  gwenview . . . ?

or, what U have installed:
sudo dpkg -l | grep .kde.

[hendrikL]

Well, for the brave

dpkg -l | awk '/.kde/{print $2}' | sed "s/:amd64//g" -> apt purge $( dpkg -l | awk '/.kde/{print $2}' | sed "s/:amd64//g")

Or save the important things like keys (ssh, rsa, pgp and so on) your private stuff ..., and install our xorg-iso, clean it and then install i3 and all the things you need,

But first test if it boots, the ISO!

Edit: and check for plasma  dpkg -l | awk '/.plasma/{print $2}' | sed "s/:amd64//g"

Edit . Edit: this results in -> dpkg -l | awk '/.kde.|.plasma./{print $2}' | sed "s/:amd64//g"

[Geier0815]

If you don't wanna use KDE, do not use it. ;-)
It's only wasted space on your disk if you don't use it but maybe this is no problem for you.

[titan]

That is what I suspected but I removed all Plasma, kde and qt and now have i3 running well.In fact I forgot how good it is and have now also put it on my main PC as well as Plasma.