“ksuperkey”- Launch the apps menu using the super key

As a KDE user migrated from M$ Windows, Gnome, and Gnome-based Desktop Environment, I used to use the Super key (The key which Windows logo drawn on) to launch the applications menu. However, in KDE I couldn’t do that! I thought that was impossible, but after seeing some distributions doing that by default like: SphinUX and SolydK, I looked for a way to enable the Super key on KDE!
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Return “history” command to zero

When we types the history command in terminal, we get the result which is the previous commands we entered, how to delete these commands and begin from scratch?

To do this you only need to put this command in your terminal:

cat /dev/null > ~/.bash_history && history -c && exit

The command cat /dev/null > ~/.bash_history clears the contain of ~/.bash_history file. And history -c deletes the current terminal history.

The References: