Meaning of available, free and buffered memory

: New version (at least 19.07.x) now use total available, used, buffered and cached in LuCi status overview

Issue: What is the difference of total available memory, free and buffered shown in LuCi status overview (or free on the command line)?

Solution:

• Total = free + buffered
• Buffered = memory that is temporarily in use to handle I/O operations
• Free = really free memory

Links: https://www.linuxatemyram.com/