LinuxTent

To find out how much space is available, and how much space a certain file occupies.
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Some terminal commands are very useful to watch your system and to get some system statistics, Here are they :

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Usually you need to run some processes without affecting the system performance, like when you run Matlab , Mathematica, or if you are running a certain program which is eating your CPU and RAM, you can change this process priority , Here is how to do it :
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