HELLO, I will try to translate this from french into english. So I was given homework, and I am a bit of a nutjob when it comes to programming in linux and would need explanations because I just do not know where to start from.

Display the contents of the file " /proc/meminfo " , it gives the state of the occupation memory:
MemTotal: 807088 kB
MemFree: 13456 kB
Buffers: 95436 kB
Cached: 470396 kB
SwapCached: 0 kB
Active: 377776 kB
Inactive: 339676 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 807088 kB
What we are interested in the first 2 lines (total memory and memory remaining), the size is expressed in kb ( Kilo-bytes)
of after these information, it wants to know the rate of occupation memory.
I need the thing down here in a box...
Mémoire totale : 788,17 Mo
Mémoire occuppée : 775,05 Mo
Mémoire libre : 13,12 Mo

"cat" , "head", "Cut" , "TR" and a script "awk" and for verification

So how exactly to I put it into a script while using awk to build tables and calculate the stuff.
Taux occupation mémoire : 98,34% => Alarm

This should get you started:
Just add additional cases in the awk script for what you need.

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Great, so for the rest I would use if and echo? to show the values, emmm how do I get the mem and free on same line withouth the [root] showing in front?