Why the `avaiable memory` is less than `total memory`?

Question

I usually use the command free -m to get the total physical memory capacity. But I found the information is not consistant with the real cpu information. For example, my computer has 8G memory, however free -m gives me the information 7.7G, Can anybody tell me the reason? And how can I get the real memory information 8G?

By reading https://stackoverflow.com/questions/20348007/how-can-i-find-out-the-total-physical-memory-ram-of-my-linux-box-suitable-to-b I know about the way to get the total memory , But I also want to know about what occupies some memory? Is it the bios?

score 0 · Answer 1 · answered Mar 26 '19 at 02:05

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Depending on your operating system, you can get a more accurate picture with cat /proc/meminfo.

answered Mar 26 '19 at 02:05

mttpgn

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that's not real memory information. And it's same as the command `free -h` – Wj S Mar 26 '19 at 02:41

Why the `avaiable memory` is less than `total memory`?

1 Answers1