[Linux] Free command

The first line describes the memory state used by the system in a global perspective:

total--Total Physical Memory

used--already uses memory, this value is generally larger because this value includes the memory used by the cache+ application

free--memory that is not fully used

shared--Application Shared Memory

buffers--cache, mainly used for directory aspects, Inode value, etc. (LS Large directory can see this value increase)

cached--cache, for files that have been opened

Summarize:

Total=used+free

Used=buffers+cached (maybe add shared also)

[Linux] Free command