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Mem Info is an interesting Python script that allows you to check the RAM usage of processes that are running on your computer. What's great about it is that you can see the memory used by all the instances of an application, together which can be very useful in certain situations, for example: the RAM memory used by all the tabs of Chromium browser, etc.

You can download Mem Info script from HERE.

How to use Mem Info script:

Use the terminal to navigate to the folder where you downloaded mem_info.py and paste this:
chmod +x mem_info.py

Then, in the same terminal window:
sudo ./mem_info.py

The output will be something like this:

top script linux

Very useful if you use multiple instances of the same application or an application which uses multiple processes.

[via ubuntu life]