Hi Team,

Could you please help me to understand what is the exact difference between htop and free -m command.

when i give free -m command, i'm getting the below.
total used free shared buffers cache

when i give htop, it will all the process running and memory details.
mem[||||||||||************** used memory/total memory]

When compared both the results, i could see the total memory both are same, but the used memory are totally different.

For example, in free -m, i could see total - 94 used-94 free 114 MB
but in htop 14GB/94GB.

Kindly help me how to check the exact ram size used.

Always post the outputs enclosed in code tags.
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Have you already checked this and this ?

This is a pretty common question that has been asked countless times on every linux forum/tech sites. So feel free to ask your favourite browser.

There is no consensus on what "used" RAM means - or how it is apportioned nor displayed. Even the kernel devs argued about it for quite a while when introducing the concept of proportional accounting of shared library objects currently loaded into memory.

Just accept that there is no "exact ram size used". The two referenced links should help - just pick a metric you are happy with. If you want some idea of the complexities involved, run this command - and that is just for the "cat" command itself.