ArtificiallyIntelligence's questions

I am using Ubuntu 20.04. I want to remove Slack app. link to slack app

I tried sudo apt-get remove slack. It reports no error and it seems to delete some files. But still, I can find Slack from the dashboard.

Even worse, I was trying to use htop to locate the path of Slack that I just opened. Guess what, it gives me a fake path that doesn't exist, called /app/extra/lib/slack/slack Then I tried to locate that path:

cd /app/extra/lib/slack
bash: cd: /app/extra/lib/slack: No such file or directory

where is it?

Problem description

I really like the 2 by 2 workspaces in Ubuntu 16.04. But it seems I can only shift workspace up and down.

Is there a way to achieve this?

What I have tried

Tried the GNOME extension called Workspace Grid (suggested here: Can I have 2x2 workspaces in GNOME 3?), however, it does not work because when I tried to install it, I cannot find installation extension in the GNOME Tweaks.