A: It isn't actually less memory: The Linux kernel takes some of the memory, so it doesn't show that. If you run the command
top
or
cat /proc/meminfo
the memory total is displayed, but with some of the memory missing. For example, on a VM with 2048MB configured, I see the following:
MemTotal: 2069808 kB
This is less than the expected amount of kilobytes (2048 * 1024 is 2097152 kB). If, however, I use this command:
sudo dmidecode --type 17 | more
I see the full memory assigned to the VM, which the screen shot shows.
Get more help at John Savill's FAQs page.
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