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Viewing resource usage with htop
When wanting to view the overall performance of your server, nothing beats 
htop
. Although not typically installed by default, 
htop
 is one of those utilities that 
I recommend everyone installs as soon as possible, since it's indispensable when 
wanting to check on the resource utilization of your server. If you don't already have 
htop
 installed, all you need to do is install it with 
apt
:
sudo apt install htop 
When you run 
htop
 at your shell prompt, you will see the 
htop
 application in all its 
glory. In some cases, it may be beneficial to run 
htop
 as 
root
, since doing so does 
give you additional options such as being able to kill processes, though this is not 
required:

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Chapter 8