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unable to see all the contents in memory i.e HDD in ubuntu 20.04

I am using DELL VOSTRO 1014. I installed Ubuntu 20.04 as main OS along with Windows 7. HDD partition is 110GB for Ubuntu and remaining for Windows. When i used disk analyzer it is showing only 35.3 GB available out of 110GB allocated for Ubuntu 20.04. But when i tried various commands like free or top

mhhsastry@mhhsastry-Vostro-1014:~$ free
              total        used        free      shared  buff/cache   available
Mem:        3984188     1698664      638384      131292     1647140     1902016
Swap:       8397820           0     8397820

This is what i am getting. so which is correct and how much memory in GB is free to load additional data?

oldfred avatar
cn flag
Do not mix hard drive storage space with RAM memory space. Free shows RAM use, but you also cache recent activity in RAM, so if you reload a recently used app it is already in RAM and does not then have to be reloaded from HDD. Best not to use Windows 7 on Internet. You will be hacked as Windows 7 is not supported anymore.
hr flag
... see for example [Understanding RAM versus hard-drive space via an analogy](https://www.cnet.com/tech/computing/understanding-ram-versus-hard-drive-space-via-an-analogy/)
N0rbert avatar
zw flag
Does this answer your question? [How to get disk usage from command line?](https://askubuntu.com/questions/21068/how-to-get-disk-usage-from-command-line)
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