Clear Terminal command history

I'm trying to clear the history of commands that have been run on Terminal, I found an article which said I can do it with rm ~/.bash_history

However, I am still able to see the previous commands that I've ran by pressing the up arrow

Solution 1:

The correct command is history -c, as shown in the picture below.

Solution 2:

An easy way to accomplish this is to close all terminal windows, and then open a single new terminal window, where you run:

rm ~/.bash_history

You'll need to close the terminal and open it again. Now when you press arrow up, you'll only see the rm command, and not earlier commands.